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Evaluate the following definite integrals without a calculator. Then write a statement about the connection between them. Check your answers with a calculator.

  1. Sketch a graph. is a linear function, and the area between and is trapezoidal.

  2. What effect does the have on the bases of the trapezoid?

  3. Notice that the the trapezoid below the function being integrated in part (b) and above the function being integrated here is equivalent to the trapezoid you found in part (a).