1. The problem statement, all variables and given/known data Let D* = [0,1] x [0,1] and define T on D* by T(x*,y*) = (x*y*, x*). Determine the image set D. Is T one-to-one? 2. Relevant equations 3. The attempt at a solution Okay... So I know it is not one to one, if you take out the point (x=0) then it is one-to-one, so you must be careful with the origin. But I don't know how to find the image set D. Because there are two variables in the first component in T x and y*. How do I find D?