You can see that the line is positive. Using the rise/run method you can see that the slope is 2/5. The y intercept is found about by finding the point that the line as crossed on the y axis. Put this together to make your equation!
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
