What compound are you talking about? What do you mean by "the product"? Do you mean pressure?
For an ideal gas,
PV = RT
where V is the volume per mole. Thus
T = (P/R) V
A graph of T vs V at a fixed pressure P would be a straight line. The higher the P, the higher the slope of the line.
how would a graph of absolute temperature (y-axis) and the product and volume look like (x-axis)?
3 answers
the product of pressure* and volume
If PV is on one axis (x) and T is on the other (y), then since PV/R = T, and R is a constant, the graph will be a single straight line passing through the origin, with slope 1/R.