I would put this equation into intercept form by dividing by 2.

X - y/2 = 1

This tells us that the x intercept is (1, 0) and the y intercept is (0, -2). Plot these two points and draw a line through them. That line is your graph.

X - y/2 = 1

This tells us that the x intercept is (1, 0) and the y intercept is (0, -2). Plot these two points and draw a line through them. That line is your graph.