This is the slope of the tangent line. Calculate the Slope of the. Because the slopes of perpendicular lines neither of which is vertical are negative reciprocals of one another the slope of the normal line to the graph of f x is 1 f x.
The numerator rise refers to how many units up or down and the.
The line through that same point that is perpendicular to the tangent line is called a normal line. Take a general point x y on the parabolaand substitutefor y. So we find equation of normal to the curve drawn at the point 0 1. To find the slope you divide the difference of the y-coordinates of 2 points on a line by the difference of the x-coordinates of those same 2 points.