first, given that (5,9) is on the graph it means that:
r(5) = 9 ............(1)
secondly, since at x = 5 we have a minimum, it means that r'(5) = 0 ........(2)
thus you will obtain two simultaneous equations where you can solve for the two unknowns
this part is trivial once you've completed the first part. just find the x's that make the denominator zero.Find the vertical asymptotes of r with the values of a and b found in part (a).