Question

On a certain function machine, an input of 3 has an output of -6. An input of -2 has an output of 4. An input of 0 has an output of 0. Which of the following phrases describes the function rule?

Multiply the input by 2.
Multiply the input by -2.
Multiply the input by -1 and then subtract 3.
Multiply the input by -1 and then add 2.

Answer 1

Answer: would be to "multiply the input by -2"

Answer 2

input of 3.....output of -6.......(3 * -2 = -6)
input of -2....output of 4........(-2 * -2 = 4)
input of 0....output of 0.........(0 * -2 = 0)

function rule : multiply the input by -2