For the following exercises, find the equation of the tangent line to the graph of the given equation at the indicated point. Use a calculator or computer software to graph the function and the tangent line.

j . For the equation x2 + 2xy 33:2 = 0, a. Find the equation of the normal to the tangent line at the point (1, 1) . b. At what other point does the normal line in a. intersect the graph of the equation? 318 . Find all points on the graph of y3 27y = x2 90 at which the tangent line is vertical