Plotting the Relationship between P and Q

[pianoplayer]

I'm not sure how to plot this. I solved for P (P=15(1/2)Q), and now I'm supposed to plot P=15(1/2)Q on a graph. :-| Help please!?!?! Below is a screen shot of what I need to do:

 

[Deleted member 4993]

I'm not sure how to plot this. I solved for P (P=15 - (1/2)Q), and now I'm supposed to plot P=15 - (1/2)Q on a graph. :-| Help please!?!?! Below is a screen shot of what I need to do:

View attachment 1611

Calculate:

When Q = 0, P = ?

and

when P = 0 , Q = ?

Now plot (0,P) and (Q,0) on the given grid and join those with a straight line.