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.
John had a distance of about miles left after driving for 50 minutes. He will reach his destination in about minutes.