Question

What is the y-intercept of the graph of 3x – 5y = 15 ?

Answer 1

Rearrange the equation to put it in terms of y:\[y=\frac{3x-15}{5}\]Now you can simply plug that into any graphing calculator (or do it by hand) and see that the y intercept is at y=-3.

Answer 2

you can also set x to zero then solve for y

3(0) - 5y = 15

-5y = 15

now solve for x ;)

Answer 3

y=-3