Hi there!
The y-intercept of the equation y = 1/2x - 3 is (0,-3).
This is because in the equation y=mx+b, the b represents the y-intercept. Since the equation of the line you were given is in y=mx+b form, you're able to easily find the y-intercept. When asked for the y-intercept, it is always best to give it as a point, you can use this - (0,y) - the y representing the y-intercept.
If there's anything else that I can help you with, please let me know! :)
