Answer
a. $9$
b. $1$
c. $-19$
Work Step by Step
The input is the $x$ value that can be substituted into the function to get the output, or $y$, value.
a. Substitute $-2$ for $x$ into the function:
$$y = -4(-2) + 1$$
Multiply first, according to order of operations:
$$y = 8 + 1$$
Add to solve:
$$y = 9$$
b. Substitute $0$ for $x$ into the function:
$$y = -4(0) + 1$$
Multiply first, according to order of operations:
$$y = 0 + 1$$
Add to solve:
$$y = 1$$
c. Substitute $5$ for $x$ into the function:
$$y = -4(5) + 1$$
Multiply first, according to order of operations:
$$y = -20 + 1$$
Add to solve:
$$y = -19$$
