Sorry for the lame question this time around but help is appreciated on this one.

I have the following formula

$\displaystyle y(t)=(v+mg/p)(m/p)(1-e^(-pt/m))-(mgt)/p$

with these values

M=1

v=20

p=1/10

Long story short it is used to show that the height of the ball, until it hits the ground.

By using maple it is giving me a liner graph, and I have a member in the group this came up in saying it should be quadratic.

As fun as maple is....(enter sarcasm here) it is not coming up at all with an quadratic graph. So is this supposed to come up being quadratic or just plain linear?