Answer
Graph:
.
Work Step by Step
Treat p as an independent variable (on the horizontal, "x-axis") and q as the dependent variable (on the vertical, "y- axis").
Using your graphing device, enter the formula
$f(x)=0.0009\times x\wedge 2-0.63\times x+245$
Set the viewing window to $[0,200]\times[0,250]$, or similar.
(The attached image is a screenshot of the work done in desmos.com.)
