# SOLUTION: A car dealership sold 650 cars in 1990 and 900 cars in 2000. Write a linear equation for cars sold. Use the equation to predict sales in 2004.

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 Click here to see ALL problems on Linear-systems Question 178885: A car dealership sold 650 cars in 1990 and 900 cars in 2000. Write a linear equation for cars sold. Use the equation to predict sales in 2004.Answer by Mathtut(3670)   (Show Source): You can put this solution on YOUR website!so we have 10 years between 1990 and 2000 : we must find the increase per year. : since the increase is 350 cars over 10 years we just divide that by number of years which is 10 : 350/10=35 : so lets call S the number of cars sold and it is a function of time t : ........so our beginning year is 1990 and in that year they sold 650 : cars. : year 2004 would be 14 year or t=14 : estimated cars sold in 2004 :