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Home > CALC > Chapter 1 > Lesson 1.3.1 > Problem 1-109


Which graph is the closest to the exact area under the curve?

Midpoint Rectangles

Notice that the graphs in the diagrams above show an increasing function. That is, as x increases, the y-values increase. What if we graphed a decreasing function instead? Would left-endpoint rectangles be underestimates then?