Question

What is the range of the function f(x) = 4x + 9, given the domain D = {-4, -2, 0, 2}?

A. R = {-17, -9, -1, 17}


B. R = {1, 7, 9, 17}


C. R = {-7, -1, 9, 17}


D. R = {-7, 1, 9, 17}

Answer 1

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`f( - 4) = 4( - 4) + 9 = - 7`

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`f( - 2) = 4( - 2) + 9 = 1`

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`f(0) = 4(0) + 9 = 9`

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`f(2) = 4(2) + 9 = 17`

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Thus ;

R = { - 7 , 1 , 9 , 17 }

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The correct answer is (( D )) .

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