For this type of problem, plug the -4 into the graph for x. So where is the line at x = -4?? y = 4 where x = -4. That's the same as saying: "what is the y-value when x = -4?) f(-4) = y = 4
You have to multiply the length by the width and the sum of that you will multiply by the height. In this case 13.5 times 12 is 162. So 162 times 14.1 is 2284.2