xtra Credit (10 points): for the rational function in Question 7, r(x) = _ 5x x 2 - 9 a. Find the behavior of r(x) near each of its vertical asymptotes: Test Point Sign of r(x) x -> x -> y -> y -> x -> x -> y -> b. Graph r(x): Make sure you show and label all asymptotes, zeros and 2 test points on each branch (with the coordinates written next to the points). A sketch purely based on using a graphing calculator will not be acceptable to earn the extra credit