I'm unsure of how to set up these types of problems.
Here's a couple from my book:
Use the limit process to find the area of the region between the graph of the and the x-axis over the given interval.
1. y=-2x+3, [0,1]
2. 64-x[sup:1skslo47]3[/sup:1skslo47], [1,4]
Also how do you determine if the left-endpoint or right-endpoint is better to use? Any help is greatly appreciated!