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What is the range of the function f(x) = 4x + 9, given the domain D = {4, -2, 0, 2}?
O A. R = {-17, -9, -1, 17)
OB. R= {1, 7, 9, 17)
C. R=17, -1, 9, 17)
OD. R= {-7, 1, 9, 17}

Respuesta :

carlosego

For this case we have that by definition, the domain of a function is given by all the values for which the function is defined.

While the range of the function is the set of all the values that [tex]f (x)[/tex] takes.

We have the following function:

[tex]f (x) = 4x + 9[/tex]

We evaluate in the domain:

[tex]f (-4) = 4 (-4) + 9 = -16 + 9 = -7\\f (-2) = 4 (-2) + 9 = -8 + 9 = 1\\f (0) = 4 (0) + 9 = 0 + 9 = 9\\f (2) = 4 (2) + 9 = 8 + 9 = 17[/tex]

ANswer:

{-7,1,9,17}

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