Directions: Numeric Entry - input your answer in the blank below.A one-to-one function is one where no value of f(x) appears for two different values of x. Which of the following functions is not one-to-one?

A

f(x) = 2x - 6

B

f(x) = x

C

f(x) = x^{2}

D

f(x) = 3x + 5

E

f(x) = 2x

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