In each problem 1-2, a parametric representation of a curve is given.
a. Graph the curve.
b. Is the curve closed? Is it simple?
c. Obtain the Cartesian equation of the curve by eliminating the parameter
1. x = 3t, y = 2t; - ∞ < t < ∞
2. x = 2t, y = 3t; - ∞ < t ≤ ∞