Concept explainers
Problems 23 and 24 refer to the system of normal equations and the formulas for a and b given on page 473.
24. If
are the averages of the v and y coordinates, respectively, show that the point
Want to see the full answer?
Check out a sample textbook solutionChapter 7 Solutions
EP CALCULUS FOR BUSINESS..-MYLAB ACCESS
- sec 3.arrow_forwardA study is made for a particular allergy medication in order to determine the length of relief it provides Y (in hours) in relation to the dosage of medication X (in mg). For this reason, ten patients were given different doses of the medication and were asked to report back when the medication seemed to wear off. Patient #1 #2 #3 #4 #5 #6 #7 #8 #9 #10 Dosage (x) Relief Hours (y) 3 3.5 4 5 6 6.5 7 8 8.5 9 9.1 5.5 12.3 9.2 14.2 16.8 22.0 18.3 24.5 22.7 (i) Draw a scatter diagram. (ii) Calculate the product moment correlation coefficient and comment on your answer. (iii) Construct the least squares regression line.arrow_forward3. If y varies inversely as x, and y= 2 when x-3, which of the following will be the value of x when у-18? А. 1 В. 2 С. 3 D. 4 4. If j varies directly with e and inversely with n, and j-4 when e-6 and n=3, which of the following will be n if j-2 when e-30? А. 24 В. 26 С. 28 D. 30arrow_forward
- (a) Draw a direction field for the given differential equation. (b) Based on an inspection of the direction field, describe how solutions behave for large t. (c) Find the general solution of the given differential equation, and use it to determine how solutions behave as t → ∞.arrow_forward14. in d you choose between 1. positively / negatively / not 2. negative / positive 3. less / greaterarrow_forward3) Find x if IS = x and IQ = 2x - 5 S Rarrow_forward
- 4. In a regression analysis, the variable that is being predicted must have the same units as the variable doing the predicting b. a. is the independent variable is the dependent variable d. с. usually is denoted by xarrow_forwardIf the Equation Hx = c is inconsistent for some c in Rn, what can you say about the equation Hx = 0? why?arrow_forwardSolve Q. 6.41 onlyarrow_forward
- .arrow_forward10. What is the value of the variable h in this equation: -7/h-1=-50 ? С. 7 A. -7 В. —49 D. 49 11. Which of the following has a solution of 5? A. 2x +14 = 10 c. 2/3y-1+4=12 В. 2х -14 %3D10 D. 2/3y+1+4=12 12. What is the index in this expression di(ax+b) ? А. с С. п В. d D. (ax+b) 13. Which of the following is NOT a radical equation? V10 c. x-2 = 5 D. Vk-4 =1 A. X= B. V2x-10 = Vx 14. How do you call(ax+b)' in this expression di(ax +b) ? A. coefficient B. index C. radical D. radicand 15. What is the extraneous root of v2-x =x- 2? С. 3 D. none А. 1 В. 2arrow_forward2. If (x + 1)7 = (x + 1)ª, for x > -1 and a is a constant, what is the value of a? а. b. 7 С. 3 10 d.arrow_forward
- Linear Algebra: A Modern IntroductionAlgebraISBN:9781285463247Author:David PoolePublisher:Cengage Learning