Question

Out a certain function machine, and input of three has an output of negative sex. And input of -2 has an output of four. And input zero has an output of zero. Which of the following phrases describes the functional rule?

Answer 1

Question:

Solution:

Consider the following diagram related to the function rule:

Notice that the only function that fits the problem description is:

f(x) = -2x

that is, because:

f(0) = -2(0) = 0

f(3) = -2(3) = -6

and

f(-2)= -2(-2) = 4

so, the correct answer would be:

MULTIPLY THE INPUT BY -2.