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4-33.
  1. Given the graph to the right of f(x) = 2x + 1, find: Homework Help ✎

    1. What is the difference between the expressions in parts (a) and (b)?

It's a trapezoid!

You could sketch another graph where the horizontal axis is called t. Or you could let x = t and use the graph above.

None. The finite areas are the same.