The manager of a large car dealership has found that there is a linear relationship between the amount of money the dealership spends on advertising and the number of cars the dealership sells per month. When the dealership spent $50,000on advertising, they sold 100 cars. For each additional $5,000 the dealership spends on advertising, they will sell 10 more cars.a. Let x be the amount of money spent on advertising. Find an equation( assuming it is linear ) that relates y , the number of cars sold, in terms of x