Question

Given the function f(x) = 4 - 2x: If the domain is {-4, 0, 5}, find the range.

A)
{-4, 4, -6}

B)
{-4, 4, 14}

C)
{12, 4, -6}

D)
{12, 4, 14)

Answer 1

first substitute -4 for x. this gives you the equation 4 - 2 * -4. can you multiply 2*-4?

Answer 2

@mouth4war can you do 2*-4?

Answer 3

-8

Answer 4

ok, good. now do 4 - (-8).

Answer 5

12

Answer 6

good. now you have the first value of your range- 12. next substitute 0 for x, which gives you the equation 4 - 2 * 0. 2 *0 is 0, so do 4-0.

Answer 7

@mouth4war ?

Answer 8

can you do 4-0

Answer 9

are you here?

Answer 10

yeah, sorry - i had to do something. and 4

Answer 11

ok. so 4 is your next range value.

Answer 12

now put in 5 for x, which gives you the equation 4 - 2 * 5. do 2 * 5.

Answer 13

@mouth4war do 2 * 5

Answer 14

10