Use the function f(x) = 4x2 − 7x − 15 to answer the questions.
part a: completely factor f(x). (2 points)
part b: what are the x-intercepts of the graph of f(x)? show your work. (2 points)
part c: describe the end behavior of the graph of f(x). explain. (2 points)
part d: what are the steps you would use to graph f(x)? justify that you can use the answers obtained in part b and part c to draw the graph. (4 points)