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

Question

when x=−4
?(1 point)
Responses

−16
negative 16

−13.5
negative 13.5

−15
negative 15

−12.5
pick one

Answer 1

To find the value of the function \( y = 18x - 13 \) when \( x = -4 \), substitute \(-4\) for \(x\):

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

Calculate \( 18(-4) \):

\[ 18 \times -4 = -72 \]

Now substitute this back into the equation:

\[ y = -72 - 13 \]

Now, calculate \(-72 - 13\):

\[ -72 - 13 = -85 \]

So, the value of the function \( y \) when \( x = -4 \) is \(-85\).

However, it seems like this answer is not among the provided options. Please double-check the problem statement or the options given. If you need the value for a different function or any other specific number, let me know!