Problem Solving. 1. Tessellate the region under the parabola and above the x-axis with squares to find a lower estimate and an upper estimate for the area under the graph. (This is the graph of y = 4 Also, find the relative difference between the two estimates as a percent of the larger estimate. 2. Use a tessellation by squares of side length unit to improve the two estimates from Problem 1. What is the relative error now? 5 3. 2 3. Use triangles, each of which is under the graph and get a lower estimate. What area do you get? 2 3 R of a square, in Problem 1 to tessellate the region

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