Graph the function y = 2.2 – |0.4x + 1|. What are the coordinates, to the nearest tenth, of the maximum of the graph?

The graph reaches its maximum when the absolute-value term is as small as possible, which is 0. Set 0.4x + 1 = 0 to get x = −2.5; then y = 2.2 − |0| = 2.2. The maximum is therefore (−2.5, 2.2), choice B.

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