Solve the problem. If the average cost function, i.e., the C(x) to produce x units of plywood is given by C(x) = 300 x + 10 What do 1000 units cost? Round your answer to the nearest cent. The planning department at Grambling State University found out from its research that the average cost of College tuition in the United States in the 2003 Spring semester was $2800 and it rose linearly to $5200 in the 2011 Spring semester. The economy was most stable in 1997 so that year was taken as the base year for calculating inflationary effect. a) Find the linear equation for this data. b) Use the equation you estimated to forecast average college tuition in the United States for 2015