What is the value of the function y=18x−13

when x=−4
?(1 point)
Responses

−16
negative 16

−13.5
negative 13.5

−15
negative 15

−12.5

1 answer

To find the value of the function \( y = 18x - 13 \) when \( x = -4 \), we can substitute \(-4\) for \(x\) in the equation.

\[ y = 18(-4) - 13 \]

Calculating \( 18 \times -4 \):

\[ y = -72 - 13 \]

Now, combine the constants:

\[ y = -72 - 13 = -85 \]

Since none of the provided responses match \(-85\), please double-check the function or the value of \(x\) given in the question.

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