AUC01 Find the area under the curve y = 5, bounded by the lines x = 0  and x = 5.

Graph the function.

It is a straight line at y = 5, parallel to the x-axis.  To find the area, integrate 5dx from x = 0 to x = 5 . 

This area integral is written as The 0 and 5 mean, evaluate the integral at 5 and then subtract the value for 0.   The operations are