Rate of Change In Exercises 91 and 92, you are given the dollar value of a product in
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- Sales Barnes & Noble had annual sales of $6.8 billion in 2013 and $6.1 billion in 2015. Use the Midpoint Formula to estimate the sales in 2014. Assume that the annual sales followed a linear pattern.arrow_forwardFlood Control A river is 8 feet above its flood stage. The water is receding at a rate of 3 inches per hour. Write a mathematical model that shows the number of feet above flood stage after t hours. Assuming the water continually recedes at this rate, when will the river be 1 foot above its flood stage?arrow_forwardNeurology The average weight of a male child’s brain is 970 grams at age 1 and 1270 grams at age 3. (a) Assuming that the relationship between brain weight y and age t is linear, write a linear model for the data. (b) What is the slope and what does it tell you about brain weight? (c) Use your model to estimate the average brain weight at age 2. (d) Use your school’s library, the Internet, or some other reference source to find the actual average brain weight at age 2. How close was your estimate? (e) (d) Do you think your model could be used to determine the average brain weight of an adult? Explain.arrow_forward
- How do I solve thisarrow_forwardAviation The Federal Aviation Administration tracks airline delays for airports around the country. During the first half of 2007, the flights delayed at Dallas-Fort Worth Airport averaged 4,500 per month. Use this information to write an equation in slope-intercept form that could be used to predict the total number of delays throughout the year. Let x equal the month of the year and y equal the cumulative delays.arrow_forwardPediatric growth charts suggest a linear relationship between age (in years) and median height (in inches) for children between 2 and 12 years of age. Two year olds have a median height of 35 inches and 12 year olds have a median height of 60inches. Generate an equation to describe height as a of age. A) H(a)= -2.5a + 30 B) H(a)= 2.5a + 35 C) H(a)= 2.5a - 30 D) H(a)= .4a - 12 E) H(a)= 2.5a + 30arrow_forward
- Men in the Workforce The number of men in theworkforce (in millions) for the years from 1950 to2050 can be approximated by the linear model determined by connecting the points 11950, 43.82 and(2050, 100.3).a. Find the annual rate of change of the model whosegraph is the line connecting these points.b. What does this tell us about men in the workforce?(Source: U.S. Census Bureau)arrow_forward35 The table shows the linear relationship between the number of hours Francis worked, x, and the amount of money Francis earned, y. Francis's Earnings Number of Hours Worked+ 1.25 3.75 5.5 Amount Earned $17.50 $52.50 $77.00 Based on the table, how much did Francis earn per hour? A $17.50 per hour B $14.00 per hour C $35.00 per hour D $24.50 per hourarrow_forward
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