M Tue Jul 6 webassign.net Consider the following function. f(x) = x2+ 2x - 1, (1, 2) (a) Find an equation of the tangent line to the graph of f at the given point. (b) Use a graphing utility to graph the function and its tangent line at the point. 10 10 5 5 EX -10 -5 5 10 -10 -5 5 5 5 O -10 O 10 10 10 5