The revenue, in dollars, of a company that produces video game systems can be modeled by the expression 5x2 + 2x – 80. the cost, in dollars, of producing the video game systems can be modeled by 5x2 – x + 100, where x is the number of video game systems sold. if profit is the difference between the revenue and the cost, what expression represents the profit?

profit can be modeled by the polynomial expression

options:

x+20
x-180
3x+20
3x-180

if 1,000 video game systems are sold, the company’s profit is $

options:

820
1,020
2,820
3,020

Aconcession manager at yankee stadium wants to know how temperature affects beer sales. she took a sample of 10 games and recorded the number of beers sold and the temperature in the middle of the game. temperature 80 68 78 79 87 74 86 92 77 84 number of beers 20533 1439 13829 21286 30985 17187 30240 87596 9610 28742 a. draw a scatter plot of the data. b. the manager estimates the regression equation to be: numberofbeers = −100, 678 + 1, 513 ∗ temperature draw this on your scatter plot. c. for one of the estimated points, indicate the residual with ei . d. for that same point, indicate what part of the variation is explained by the model with ˆyi − y¯.