What is the estimate of the area under the curve of f using

Last updated: 7/20/2022

What is the estimate of the area under the curve of f using rectangular approximations and sample points on the interval [-1.5, 1.5]? Evaluate the function at: x = -1.3 on [-1.5, -1] x= -0.7 on [-1,0] x = 0.7 on [0, 1] x = 1.3 on [1, 1.5]