Quadratic Functions: Factored Form Answers

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The graph of the function f(x) = (x – 4)(x + 1) is shown below.

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A
The function is increasing for all real values of x wherex < 0.
B
The function is increasing for all real values of x wherex 4.
C
The function is decreasing for all real values of x where–1 < x < 4.
D
The function is decreasing for all real values of x wherex < 1.5.

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Quadratic Functions: Factored Form Answers…