- 2

- 0

^{2}/ a

^{2}- y

^{2}/b

^{2}= 1 ( or written in the other way, with y

^{2}as first term ) . This equation , plotted, result in a different type of graphic as I learned on T=constant transformation ! My question is why I used to draw the curbe line graph in p-V coordinates of an equation like y=1/x ? ( as pV= constant ) , saying that it is a hyperbola? What has got to do with an arc of hyperbola? Thank you !