Question
What is the value of the function y= 1/8x-13 when x=-4? A. -13.5 b. -15 c.-16 d. -12.5
Answers
GPT-4o
To find the value of the function \( y = \frac{1}{8}x - 13 \) when \( x = -4 \), substitute \( -4 \) in place of \( x \):
\[
y = \frac{1}{8}(-4) - 13
\]
First, calculate \( \frac{1}{8}(-4) \):
\[
\frac{1}{8} \times -4 = -\frac{4}{8} = -\frac{1}{2} = -0.5
\]
Then, subtract 13 from \( -0.5 \):
\[
y = -0.5 - 13 = -13.5
\]
Therefore, the value of the function when \( x = -4 \) is \( -13.5 \).
The correct answer is:
A. -13.5
\[
y = \frac{1}{8}(-4) - 13
\]
First, calculate \( \frac{1}{8}(-4) \):
\[
\frac{1}{8} \times -4 = -\frac{4}{8} = -\frac{1}{2} = -0.5
\]
Then, subtract 13 from \( -0.5 \):
\[
y = -0.5 - 13 = -13.5
\]
Therefore, the value of the function when \( x = -4 \) is \( -13.5 \).
The correct answer is:
A. -13.5