CPM Homework Help : GB8I Problem 11-91

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11-91.

Use the graph below to write a possible equation in $f(x)=ab^x$ form.

Hint:

Refer to problem 9-10.

Decreasing exponential curve, horizontal asymptote on x axis, with 2 highlighted points: (negative 1, comma 15), & (0, comma 3), with slope triangle between the points labeled, vertical leg, negative 12, vertical leg, +2.