Question

What is the y-intercept of the line with the equation 4x + 9y = -108

Answer 1

To find y-intercept, let x=0 and solve for y

Answer 2

Another way of looking at this is to use the equation of a line which is:

y = mx +b where m is the slope and b is the y-intercept

Therefore,
4x + 9y = -108
9y = -4x - 108
y = -(4/9)x - 108/9
y = -(4/9)x - 12

Therefore, the y-intercept is -12