Question 38216
If V = 121 = (pi)(r^2)h and we need to write h as a function of r, merely solve for h...thus
121 = (pi)(r^2)h
h = 121 / (pi)(r^2)
If r = 3 cm, just plug it in and get
h = 121 / 9(pi)
I cannot graph it here due to the limitations of this interface, but you can start by plotting points, (r, h)...it will be hyperbolic in nature...