Question

Nine times the input minus seven is equal to the output. If the input is -1, what is the output?

-16
-2
-72
2

Answer 1

(A) -16 is your answer

Explanation:

let input = x, output = y

When x = -1

9(x) - 7 = y (is your equation)

Plug in -1 for x

9(-1) - 7 = y

Simplify. First, multiply 9 with -1

9(-1) = -9

Next, combine like terms

-9 - 7 = y

-16 = y

(A) -16 is your answer

~So Shines a Good Deed in a Weary World

Answer 2

9x-7 =y

9(-1) -7 =y

-16 =y

Choice A