Graph each pair of parametric equations in a friendly window with factor 2, then eliminate the parameter to get a single equation using only x and y. Graph the resulting equation and describe how it compares with the original graph.
a. x = 2t - 5 and y = t + 1
b. x = t2 + 1 and y = t - 2, - 2 ( t ( 6
c. x = t+1/2 and y = t2, - 4 ( t ( 3
d. x = (t+2 and y = t -3