Answer :

Answer:

Step-by-step explanation:

general form of equation is:

y = mx + c

where constant, c is the y-intercept

1.

y + 6 = 3x

y = 3x - 6

thus, y-intercept = -6

2.

y = -4x + 4

thus, y-intercept = 4

3.

y = -2x + 12

thus, y-intercept = 12