Acompany finds that there is a linear relationship between the amount of money that it spends on advertising and the number of units it sells. if it spends no money on advertising it sells 100 units. for each additional $2500 spent, an additional 25 units are sold. if x is the amount of money that the company spends on advertising, find a formula for y, the number of units sold as a function of x. (do not use commas in your formula)

Companies in the u.s. car rental market vary greatly in terms of the size of the fleet, the number of locations, and annual revenue. in 2011 hertz had 320,000 cars in service and annual revenue of approximately $4.2 billion. the following data show the number of cars in service (1000s) and the annual revenue ($ millions) for six smaller car rental companies (auto rental news website, august 7, 2012). excel file: data14-09.xls if required, enter negative values as negative numbers. a. select a scatter diagram with the number of cars in service as the independent variable. b. what does the scatter diagram developed in part (a) indicate about the relationship between the two variables? c. use the least squares method to develop the estimated regression equation (to 3 decimals). ŷ = + x d. for every additional car placed in service, estimate how much annual revenue will change. by $ e. fox rent a car has 11,000 cars in service. use the estimated regression equation developed in part (c) to predict annual revenue for fox rent a car. round your answer to nearest whole value. $ million hide feedback partially correct

Suppose that with a budget of $110, deborah spends $66 on sushi and $44 on bagels when sushi costs $2 per piece and bagels cost $2 per bagel. but then, the price of bagels falls to $1 per bagel.

John has been working as a tutor for $300 a semester. when the university raises the price it pays tutors to $400, jasmine enters the market and begins tutoring as well. how much does producer surplus rise as a result of this price increase?