Reason: in the formula y = 1/4x +3 The 1/4 is the slope The 3 is the y intercept We start on the y intercept (3) and use the slope to count 1 up and 4 to the right. For the formula x = 4 just plot the point on number 4 on the x line The intercept is the point that the two formulas have in common. I also graphed it to give you a visual of it Hope this helps