Which ordered pair represents the y-intercept of the graph of the equation y = -3x - 9? , 0) , 0) c.(0, -3) d.(0, -9)

Equation

y = -3x - 9


Option 1

If I substitute x = -9, I should get y = 0

When x = -9
y = -3 (-9) - 9
= 18 (I did not get 0, wrong)


Option 2

If I substitute x = -3, I should get y = 0
y = -3(-3) - 9
y = 9 - 9 
y = 0 (Yes, I got 0, correct)


Option 3

If I substitute x = 0, I should get y = -3
y = -3 (0) - 9
y = 0 - 9
y = -9 (I did not get -3, wrong)


Option 4

If I substitute x = 0, I should get y = -9
y = -3 (0) - 9
y = 0 - 9
y = -9 (Yes, I got -9, correct)


(-3, 0) and (0, 9) are ordered pairs of the equation (Answer B, D)