Maths-
SAT
Easy

Question


For the exponential function f, the table shows some values of x and the corresponding values of f(x). The function can be written in the form f(x)=prx, where p and r are constants. What is the value of r?

The correct answer is: 4/3


    f(x) = prx
    f(0) = pr0 = 9
    p = 9
    f(1) = pr1 = 9(r)1 = 12
    r equals 12 over 9 equals 4 over 3 equals 1.33.

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