Question

PLEASE HELP I DON'T UNDERSTAND THIS!!!!!

Answer 1

Answer: C (4, 0)

Explanation:

your function y = 12 - 3x

They are asking which of those points are on the line

(x, y) this is a format of a point where you can plug in x for x and y for y.

a. (4, 3) x=4 y=3 substitute and see if your answer is true

3 = 12 -3(4)

3 = 0 this is not true so (4, 3) is not a solution

b. (-4,4) x= -4 y=4

4 = 12 - 3(-4)

4 = 24 not true

c. (4, 0) x=4 y=0

0 = 12-3(4)

0 = 0 true (4,0) is a solution

d. (0, 4)

4 = 12 - 3 (0)

4=12

Answer 2

C. (4, 0)

Explanation:

(x, y)

a. (4, 3)

y = 12 - 3x

3 = 12 - 3(4)

3 = 12 - 12

3 = 0 false

b. (-4, 4)

y = 12 - 3x

4 = 12 - 3(-4)

4 = 12 + 12

4 = 24 false

c. (4, 0)

y = 12 - 3x

0 = 12 - 3(4)

0 = 12 - 12

0 = 0 true

d. (0, 4)

y = 12 - 3x

4 = 12 - 3(0)

4 = 12 - 0

4 = 12 false.