Question

William writes a function f(x) = 2x - 10. He uses an

input-output table to represent the function.
Input: 4
Output: -8

What is the output of William's function when the
input is 4?

Answer 1

Answer: -8

Explanation:

When the input is 4, according to the input-output table, the output is -8.

Plugging 4 into the function f(x) = 2x - 10 directly also gives the same result:

f(4) = 2(4) - 10 = 8 - 10 = -2

So the output of William's function when the input is 4 is -8.