Question

Find the output of the function y=−1/7x+8
when the input is 21. (1 point)
The output of the function y=−1/7x+8
is
when the input is 21.

Answer 1

To find the output of the function \( y = -\frac{1}{7}x + 8 \) when the input \( x \) is 21, we can substitute 21 into the equation for \( x \):

\[
y = -\frac{1}{7}(21) + 8
\]

Calculating \( -\frac{1}{7}(21) \):

\[
-\frac{21}{7} = -3
\]

Now, substitute this value back into the equation:

\[
y = -3 + 8
\]

Now simplify:

\[
y = 5
\]

Thus, the output of the function when the input is 21 is \( 5 \).