5-10 (a) Sketch the curve by using the parametric equations to plot points. Indicate with an arrow the direction in which the curve is traced as t increases. (b) Eliminate the parameter to find a Cartesian equation of the curve. 5. x = 2t - 1, y = 2t+ 1 6. x = 3t + 2, y = 2t+ 3 7. x =12 - 3, y=t+2, -3