Let's begin with the following relationship between the variables U, Q, and P (Note 3 and it are constants). 3 P2 U2 TT Q(1.2) i) Which plot(s) from 1.1 are linear? ii) How could you tell without graphing? Discuss this in a few sentences using the word "proportional". lil) If U is held constant (i.e. U = 1), what graphing relationship between P and Q would yield a straight line (i.e. the graph would be linear)