EBK ALGEBRA FOUNDATIONS
15th Edition
ISBN: 9780321978929
Author: Martin-Gay
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 15, Problem 19R
To determine
Tofind : equation of line using the given information.
Expert Solution & Answer

Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Solve questions by Course Name (Ordinary Differential Equations II 2)
please Solve questions by Course Name( Ordinary Differential Equations II 2)
InThe Northern Lights are bright flashes of colored light between 50 and 200 miles above Earth.
Suppose a flash occurs 150 miles above Earth. What is the measure of arc BD, the portion of Earth
from which the flash is visible? (Earth’s radius is approximately 4000 miles.)
Chapter 15 Solutions
EBK ALGEBRA FOUNDATIONS
Ch. 15.1 - Use the choices given to fill in each blank. Not...Ch. 15.1 - Prob. 2VRVCCh. 15.1 - Prob. 3VRVCCh. 15.1 - State the slope and the y-intercept of the graph...Ch. 15.1 - Prob. 5VRVCCh. 15.1 - Prob. 6VRVCCh. 15.1 - Prob. 7VRVCCh. 15.1 - Prob. 8VRVCCh. 15.1 - Prob. 9VRVCCh. 15.1 - Prob. 10VRVC
Ch. 15.1 - Prob. 1ESCh. 15.1 - Prob. 2ESCh. 15.1 - Prob. 3ESCh. 15.1 - Prob. 4ESCh. 15.1 - Prob. 5ESCh. 15.1 - Prob. 6ESCh. 15.1 - Prob. 7ESCh. 15.1 - Objetive A Graph each linear function. See Example...Ch. 15.1 - Prob. 9ESCh. 15.1 - Prob. 10ESCh. 15.1 - Prob. 11ESCh. 15.1 - Prob. 12ESCh. 15.1 - Prob. 13ESCh. 15.1 - Prob. 14ESCh. 15.1 - Prob. 15ESCh. 15.1 - Prob. 16ESCh. 15.1 - Prob. 17ESCh. 15.1 - Prob. 18ESCh. 15.1 - Prob. 19ESCh. 15.1 - Prob. 20ESCh. 15.1 - Prob. 21ESCh. 15.1 - Prob. 22ESCh. 15.1 - Prob. 23ESCh. 15.1 - Prob. 24ESCh. 15.1 - Prob. 25ESCh. 15.1 - Prob. 26ESCh. 15.1 - Prob. 27ESCh. 15.1 - Prob. 28ESCh. 15.1 - Prob. 29ESCh. 15.1 - Prob. 30ESCh. 15.1 - Prob. 31ESCh. 15.1 - Prob. 32ESCh. 15.1 - Find an equation of the line passing through the...Ch. 15.1 - Prob. 34ESCh. 15.1 - Prob. 35ESCh. 15.1 - Prob. 36ESCh. 15.1 - Prob. 37ESCh. 15.1 - Prob. 38ESCh. 15.1 - Prob. 39ESCh. 15.1 - Prob. 40ESCh. 15.1 - Prob. 41ESCh. 15.1 - Prob. 42ESCh. 15.1 - Prob. 43ESCh. 15.1 - Prob. 44ESCh. 15.1 - Prob. 45ESCh. 15.1 - Prob. 46ESCh. 15.1 - Prob. 47ESCh. 15.1 - Prob. 48ESCh. 15.1 - Prob. 49ESCh. 15.1 - Prob. 50ESCh. 15.1 - Prob. 51ESCh. 15.1 - Prob. 52ESCh. 15.1 - Prob. 53ESCh. 15.1 - Objective B C Mixed Practice Find an equation of...Ch. 15.1 - Prob. 55ESCh. 15.1 - Prob. 56ESCh. 15.1 - Prob. 57ESCh. 15.1 - Prob. 58ESCh. 15.1 - Prob. 59ESCh. 15.1 - Prob. 60ESCh. 15.1 - Prob. 61ESCh. 15.1 - Prob. 62ESCh. 15.1 - Prob. 63ESCh. 15.1 - Prob. 64ESCh. 15.1 - Prob. 65ESCh. 15.1 - Prob. 66ESCh. 15.1 - Prob. 67ESCh. 15.1 - Prob. 68ESCh. 15.1 - Prob. 69ESCh. 15.1 - Prob. 70ESCh. 15.1 - Prob. 71ESCh. 15.1 - Prob. 72ESCh. 15.1 - Prob. 73ESCh. 15.1 - Prob. 74ESCh. 15.1 - Prob. 75ESCh. 15.1 - Prob. 76ESCh. 15.1 - Prob. 77ESCh. 15.1 - Prob. 78ESCh. 15.1 - Prob. 79ESCh. 15.1 - Prob. 80ESCh. 15.1 - Prob. 81ESCh. 15.1 - Prob. 82ESCh. 15.1 - Prob. 83ESCh. 15.1 - Prob. 84ESCh. 15.1 - Prob. 85ESCh. 15.1 - Prob. 86ESCh. 15.1 - Prob. 87ESCh. 15.1 - Prob. 88ESCh. 15.1 - Prob. 89ESCh. 15.1 - Prob. 90ESCh. 15.1 - Find an equation of the perpendicular bisector of...Ch. 15.1 - Prob. 92ESCh. 15.1 - Solve. 93. Describe how to check to see if the...Ch. 15.2 - Prob. 1VRVCCh. 15.2 - Prob. 2VRVCCh. 15.2 - Prob. 3VRVCCh. 15.2 - Prob. 4VRVCCh. 15.2 - Prob. 1ESCh. 15.2 - Prob. 2ESCh. 15.2 - Prob. 3ESCh. 15.2 - Prob. 4ESCh. 15.2 - Prob. 5ESCh. 15.2 - Prob. 6ESCh. 15.2 - Prob. 7ESCh. 15.2 - Prob. 8ESCh. 15.2 - Prob. 9ESCh. 15.2 - Prob. 10ESCh. 15.2 - Prob. 11ESCh. 15.2 - Prob. 12ESCh. 15.2 - Prob. 13ESCh. 15.2 - Prob. 14ESCh. 15.2 - Prob. 15ESCh. 15.2 - Prob. 16ESCh. 15.2 - Prob. 17ESCh. 15.2 - Prob. 18ESCh. 15.2 - Prob. 19ESCh. 15.2 - Prob. 20ESCh. 15.2 - Prob. 21ESCh. 15.2 - Prob. 22ESCh. 15.2 - Prob. 23ESCh. 15.2 - Prob. 24ESCh. 15.2 - Prob. 25ESCh. 15.2 - Prob. 26ESCh. 15.2 - Prob. 27ESCh. 15.2 - Prob. 28ESCh. 15.2 - Prob. 29ESCh. 15.2 - Prob. 30ESCh. 15.2 - Prob. 31ESCh. 15.2 - Prob. 32ESCh. 15.2 - Prob. 33ESCh. 15.2 - Prob. 34ESCh. 15.2 - Prob. 35ESCh. 15.2 - Prob. 36ESCh. 15.2 - Prob. 37ESCh. 15.2 - Prob. 38ESCh. 15.2 - Prob. 39ESCh. 15.2 - Prob. 40ESCh. 15.2 - Prob. 41ESCh. 15.2 - Prob. 42ESCh. 15.2 - Prob. 43ESCh. 15.2 - Prob. 44ESCh. 15.2 - Prob. 45ESCh. 15.2 - Prob. 46ESCh. 15.2 - Prob. 47ESCh. 15.2 - Prob. 48ESCh. 15.2 - Prob. 49ESCh. 15.2 - Prob. 50ESCh. 15.2 - Forensic scientists use the following functions to...Ch. 15.2 - Prob. 52ESCh. 15.2 - Prob. 53ESCh. 15.2 - Prob. 54ESCh. 15.2 - Prob. 55ESCh. 15.2 - Prob. 56ESCh. 15.2 - Prob. 57ESCh. 15.2 - Prob. 58ESCh. 15.2 - Prob. 59ESCh. 15.2 - Prob. 60ESCh. 15.2 - Prob. 61ESCh. 15.2 - Prob. 62ESCh. 15.2 - Prob. 63ESCh. 15.2 - Prob. 64ESCh. 15.2 - Prob. 65ESCh. 15.2 - Prob. 66ESCh. 15.2 - Prob. 67ESCh. 15.2 - Prob. 68ESCh. 15.2 - Graph y=x24x+7. Let x=0,1,2,3,4 to generate...Ch. 15.2 - Graph y=x2+2x+3. Let x=3,2,1,0,1 to generate...Ch. 15.2 - Prob. 71ESCh. 15.3 - Prob. 1VRVCCh. 15.3 - Prob. 2VRVCCh. 15.3 - Prob. 3VRVCCh. 15.3 - Prob. 4VRVCCh. 15.3 - Prob. 1ESCh. 15.3 - Prob. 2ESCh. 15.3 - Prob. 3ESCh. 15.3 - Prob. 4ESCh. 15.3 - Prob. 5ESCh. 15.3 - Prob. 6ESCh. 15.3 - Prob. 7ESCh. 15.3 - Prob. 8ESCh. 15.3 - Prob. 9ESCh. 15.3 - Prob. 10ESCh. 15.3 - Prob. 11ESCh. 15.3 - Prob. 12ESCh. 15.3 - Prob. 13ESCh. 15.3 - Prob. 14ESCh. 15.3 - Prob. 15ESCh. 15.3 - Prob. 16ESCh. 15.3 - Prob. 17ESCh. 15.3 - Prob. 18ESCh. 15.3 - Prob. 19ESCh. 15.3 - Prob. 20ESCh. 15.3 - Prob. 21ESCh. 15.3 - Prob. 22ESCh. 15.3 - Prob. 23ESCh. 15.3 - Prob. 24ESCh. 15.3 - Prob. 25ESCh. 15.3 - Prob. 26ESCh. 15.3 - Prob. 27ESCh. 15.3 - Prob. 28ESCh. 15.3 - Prob. 29ESCh. 15.3 - Prob. 30ESCh. 15.3 - Prob. 31ESCh. 15.3 - Prob. 32ESCh. 15.3 - Prob. 33ESCh. 15.3 - Prob. 34ESCh. 15.3 - Prob. 35ESCh. 15.3 - Prob. 36ESCh. 15.3 - Prob. 37ESCh. 15.3 - Prob. 38ESCh. 15.3 - Prob. 39ESCh. 15.3 - Prob. 40ESCh. 15.3 - Prob. 41ESCh. 15.3 - Prob. 42ESCh. 15.3 - Prob. 43ESCh. 15.3 - Prob. 44ESCh. 15.3 - Prob. 45ESCh. 15.3 - Prob. 46ESCh. 15.3 - Prob. 47ESCh. 15.3 - Prob. 48ESCh. 15.3 - Prob. 49ESCh. 15.3 - Prob. 50ESCh. 15.3 - Prob. 51ESCh. 15.3 - Prob. 52ESCh. 15.3 - Prob. 53ESCh. 15.3 - Prob. 54ESCh. 15.3 - Prob. 55ESCh. 15.3 - Prob. 56ESCh. 15.3 - Prob. 57ESCh. 15.3 - Prob. 58ESCh. 15.3 - Prob. 59ESCh. 15.3 - Prob. 60ESCh. 15.3 - Prob. 61ESCh. 15.3 - Prob. 62ESCh. 15.3 - Prob. 63ESCh. 15.3 - Prob. 64ESCh. 15.3 - Prob. 65ESCh. 15.3 - Prob. 66ESCh. 15.3 - Prob. 67ESCh. 15.3 - Prob. 68ESCh. 15.3 - Prob. 69ESCh. 15.3 - Prob. 70ESCh. 15.4 - Prob. 1VRVCCh. 15.4 - Prob. 2VRVCCh. 15.4 - Prob. 3VRVCCh. 15.4 - Prob. 4VRVCCh. 15.4 - Prob. 5VRVCCh. 15.4 - Prob. 6VRVCCh. 15.4 - Prob. 7VRVCCh. 15.4 - Prob. 8VRVCCh. 15.4 - Prob. 1ESCh. 15.4 - Prob. 2ESCh. 15.4 - Prob. 3ESCh. 15.4 - Prob. 4ESCh. 15.4 - Prob. 5ESCh. 15.4 - Prob. 6ESCh. 15.4 - Prob. 7ESCh. 15.4 - Prob. 8ESCh. 15.4 - Prob. 9ESCh. 15.4 - Prob. 10ESCh. 15.4 - Prob. 11ESCh. 15.4 - Prob. 12ESCh. 15.4 - Prob. 13ESCh. 15.4 - Prob. 14ESCh. 15.4 - Prob. 15ESCh. 15.4 - Prob. 16ESCh. 15.4 - Prob. 17ESCh. 15.4 - Prob. 18ESCh. 15.4 - Prob. 19ESCh. 15.4 - Prob. 20ESCh. 15.4 - Prob. 21ESCh. 15.4 - Prob. 22ESCh. 15.4 - Prob. 23ESCh. 15.4 - Prob. 24ESCh. 15.4 - Prob. 25ESCh. 15.4 - Prob. 26ESCh. 15.4 - Prob. 27ESCh. 15.4 - Prob. 28ESCh. 15.4 - Prob. 29ESCh. 15.4 - Prob. 30ESCh. 15.4 - Prob. 31ESCh. 15.4 - Prob. 32ESCh. 15.4 - Prob. 33ESCh. 15.4 - Prob. 34ESCh. 15.4 - Prob. 35ESCh. 15.4 - Prob. 36ESCh. 15.4 - Prob. 37ESCh. 15.4 - Prob. 38ESCh. 15.4 - Objective D Solve. See Example 7. 39. The maximum...Ch. 15.4 - Objective D Solve. See Example 7. 40. The number...Ch. 15.4 - Prob. 41ESCh. 15.4 - Prob. 42ESCh. 15.4 - Prob. 43ESCh. 15.4 - Prob. 44ESCh. 15.4 - Prob. 45ESCh. 15.4 - Prob. 46ESCh. 15.4 - Prob. 47ESCh. 15.4 - Prob. 48ESCh. 15.4 - Prob. 49ESCh. 15.4 - Prob. 50ESCh. 15.4 - Prob. 51ESCh. 15.4 - Prob. 52ESCh. 15.4 - Prob. 53ESCh. 15.4 - Prob. 54ESCh. 15.4 - Prob. 55ESCh. 15.4 - Prob. 56ESCh. 15.4 - Prob. 57ESCh. 15.4 - Prob. 58ESCh. 15.4 - Prob. 59ESCh. 15.4 - Prob. 60ESCh. 15.4 - Prob. 61ESCh. 15.4 - Prob. 62ESCh. 15.4 - Prob. 63ESCh. 15.4 - Prob. 64ESCh. 15.4 - Prob. 65ESCh. 15.4 - Prob. 66ESCh. 15.4 - Prob. 67ESCh. 15.4 - Prob. 68ESCh. 15.4 - Prob. 69ESCh. 15.4 - Prob. 70ESCh. 15.4 - Prob. 71ESCh. 15.4 - Prob. 72ESCh. 15.4 - Prob. 73ESCh. 15.4 - Prob. 74ESCh. 15.4 - Prob. 75ESCh. 15.4 - Prob. 76ESCh. 15.4 - Prob. 77ESCh. 15.4 - Prob. 78ESCh. 15 - Prob. 1IRCh. 15 - Prob. 2IRCh. 15 - Prob. 3IRCh. 15 - Prob. 4IRCh. 15 - Prob. 5IRCh. 15 - Prob. 6IRCh. 15 - Prob. 7IRCh. 15 - Prob. 8IRCh. 15 - Prob. 9IRCh. 15 - Prob. 10IRCh. 15 - Prob. 11IRCh. 15 - Prob. 12IRCh. 15 - Prob. 13IRCh. 15 - Prob. 14IRCh. 15 - Prob. 15IRCh. 15 - Prob. 16IRCh. 15 - Prob. 17IRCh. 15 - Prob. 18IRCh. 15 - Prob. 19IRCh. 15 - Prob. 20IRCh. 15 - Prob. 21IRCh. 15 - Prob. 22IRCh. 15 - Prob. 23IRCh. 15 - Prob. 24IRCh. 15 - Prob. 25IRCh. 15 - Prob. 26IRCh. 15 - Prob. 1VCCh. 15 - Prob. 2VCCh. 15 - Prob. 3VCCh. 15 - Prob. 4VCCh. 15 - Prob. 5VCCh. 15 - Prob. 6VCCh. 15 - Prob. 7VCCh. 15 - Prob. 8VCCh. 15 - Prob. 9VCCh. 15 - Prob. 1RCh. 15 - Prob. 2RCh. 15 - Prob. 3RCh. 15 - Prob. 4RCh. 15 - Prob. 5RCh. 15 - Prob. 6RCh. 15 - Prob. 7RCh. 15 - Prob. 8RCh. 15 - Prob. 9RCh. 15 - Prob. 10RCh. 15 - Prob. 11RCh. 15 - Prob. 12RCh. 15 - Prob. 13RCh. 15 - Prob. 14RCh. 15 - Prob. 15RCh. 15 - Prob. 16RCh. 15 - Prob. 17RCh. 15 - Prob. 18RCh. 15 - Prob. 19RCh. 15 - Prob. 20RCh. 15 - Prob. 21RCh. 15 - Prob. 22RCh. 15 - Prob. 23RCh. 15 - Prob. 24RCh. 15 - Prob. 25RCh. 15 - Prob. 26RCh. 15 - Prob. 27RCh. 15 - Prob. 28RCh. 15 - Prob. 29RCh. 15 - Prob. 30RCh. 15 - Prob. 31RCh. 15 - Prob. 32RCh. 15 - Prob. 33RCh. 15 - Prob. 34RCh. 15 - Prob. 35RCh. 15 - Prob. 36RCh. 15 - Prob. 37RCh. 15 - Prob. 38RCh. 15 - Prob. 39RCh. 15 - Prob. 40RCh. 15 - Prob. 41RCh. 15 - Prob. 42RCh. 15 - Prob. 43RCh. 15 - Prob. 44RCh. 15 - Prob. 45RCh. 15 - Prob. 46RCh. 15 - Prob. 47RCh. 15 - Prob. 48RCh. 15 - Prob. 49RCh. 15 - Prob. 50RCh. 15 - Prob. 51RCh. 15 - Prob. 52RCh. 15 - Prob. 53RCh. 15 - Prob. 54RCh. 15 - Prob. 55RCh. 15 - Prob. 56RCh. 15 - Prob. 57RCh. 15 - Prob. 58RCh. 15 - Prob. 59RCh. 15 - Prob. 60RCh. 15 - Prob. 1TCh. 15 - Prob. 2TCh. 15 - Prob. 3TCh. 15 - Prob. 4TCh. 15 - Prob. 5TCh. 15 - Prob. 6TCh. 15 - Prob. 7TCh. 15 - Prob. 8TCh. 15 - Prob. 9TCh. 15 - Prob. 10TCh. 15 - Prob. 11TCh. 15 - Prob. 12TCh. 15 - Prob. 13TCh. 15 - Prob. 14TCh. 15 - Prob. 15TCh. 15 - Prob. 16TCh. 15 - Prob. 17TCh. 15 - Prob. 18TCh. 15 - Prob. 19TCh. 15 - Prob. 20TCh. 15 - Prob. 21TCh. 15 - Prob. 22TCh. 15 - Prob. 23TCh. 15 - Prob. 24TCh. 15 - Prob. 25TCh. 15 - Prob. 1CRCh. 15 - Prob. 2CRCh. 15 - Prob. 3CRCh. 15 - Prob. 4CRCh. 15 - Prob. 5CRCh. 15 - Prob. 6CRCh. 15 - Prob. 7CRCh. 15 - Prob. 8CRCh. 15 - Prob. 9CRCh. 15 - Prob. 10CRCh. 15 - Prob. 11CRCh. 15 - Prob. 12CRCh. 15 - Prob. 13CRCh. 15 - Prob. 14CRCh. 15 - Prob. 15CRCh. 15 - Prob. 16CRCh. 15 - Prob. 17CRCh. 15 - Prob. 18CRCh. 15 - Prob. 19CRCh. 15 - Prob. 20CRCh. 15 - Prob. 21CRCh. 15 - Prob. 22CRCh. 15 - Prob. 23CRCh. 15 - Prob. 24CRCh. 15 - Prob. 25CRCh. 15 - Prob. 26CRCh. 15 - Prob. 27CRCh. 15 - Prob. 28CRCh. 15 - Prob. 29CRCh. 15 - Prob. 30CRCh. 15 - Prob. 31CRCh. 15 - Prob. 32CRCh. 15 - Prob. 33CRCh. 15 - Prob. 34CRCh. 15 - Prob. 35CRCh. 15 - Prob. 36CRCh. 15 - Prob. 37CRCh. 15 - Prob. 38CRCh. 15 - Prob. 39CRCh. 15 - Prob. 40CRCh. 15 - Prob. 41CRCh. 15 - Prob. 42CR
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, algebra and related others by exploring similar questions and additional content below.Similar questions
- e). n! (n - 1)!arrow_forwardSuppose you flip a fair two-sided coin four times and record the result. a). List the sample space of this experiment. That is, list all possible outcomes that could occur when flipping a fair two-sided coin four total times. Assume the two sides of the coin are Heads (H) and Tails (T).arrow_forwarde). n! (n - 1)!arrow_forward
- Evaluate the following expression and show your work to support your calculations. a). 6! b). 4! 3!0! 7! c). 5!2! d). 5!2! e). n! (n - 1)!arrow_forwardAmy and Samiha have a hat that contains two playing cards, one ace and one king. They are playing a game where they randomly pick a card out of the hat four times, with replacement. Amy thinks that the probability of getting exactly two aces in four picks is equal to the probability of not getting exactly two aces in four picks. Samiha disagrees. She thinks that the probability of not getting exactly two aces is greater. The sample space of possible outcomes is listed below. A represents an ace, and K represents a king. Who is correct?arrow_forwardConsider the exponential function f(x) = 12x. Complete the sentences about the key features of the graph. The domain is all real numbers. The range is y> 0. The equation of the asymptote is y = 0 The y-intercept is 1arrow_forward
- The graph shows Alex's distance from home after biking for x hours. What is the average rate of change from -1 to 1 for the function? 4-2 о A. -2 О B. 2 О C. 1 O D. -1 ty 6 4 2 2 0 X 2 4arrow_forwardWrite 7. √49 using rational exponents. ○ A. 57 47 B. 7 O C. 47 ○ D. 74arrow_forwardCan you check If my short explantions make sense because I want to make sure that I describe this part accuratelyarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Algebra: Structure And Method, Book 1AlgebraISBN:9780395977224Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. ColePublisher:McDougal LittellGlencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw HillCollege Algebra (MindTap Course List)AlgebraISBN:9781305652231Author:R. David Gustafson, Jeff HughesPublisher:Cengage Learning
- Trigonometry (MindTap Course List)TrigonometryISBN:9781337278461Author:Ron LarsonPublisher:Cengage LearningElementary AlgebraAlgebraISBN:9780998625713Author:Lynn Marecek, MaryAnne Anthony-SmithPublisher:OpenStax - Rice University

Algebra: Structure And Method, Book 1
Algebra
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:McDougal Littell

Glencoe Algebra 1, Student Edition, 9780079039897...
Algebra
ISBN:9780079039897
Author:Carter
Publisher:McGraw Hill

College Algebra (MindTap Course List)
Algebra
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:Cengage Learning

Trigonometry (MindTap Course List)
Trigonometry
ISBN:9781337278461
Author:Ron Larson
Publisher:Cengage Learning


Elementary Algebra
Algebra
ISBN:9780998625713
Author:Lynn Marecek, MaryAnne Anthony-Smith
Publisher:OpenStax - Rice University
Points, Lines, Planes, Segments, & Rays - Collinear vs Coplanar Points - Geometry; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=dDWjhRfBsKM;License: Standard YouTube License, CC-BY
Naming Points, Lines, and Planes; Author: Florida PASS Program;https://www.youtube.com/watch?v=F-LxiLSSaLg;License: Standard YouTube License, CC-BY