Brenda wants to buy a new car and has a budget of $25,000. she has just found a magazine that assigns each car an index for styling and an index for gas mileage. each index runs from 0-10, with 10 representing either the most styling or the best gas mileage. while looking at the list of cars, brenda observes that on average, as the style index rises by one unit, the price of the car increases by $5,000. she also observed that as the gas mileage index rises by one unit, the price of the car increases by $2,500.