Find a parametrization r ( t ) r(t) of the line through the origin whose projection on the x y - xy- plane is a line of slope 8 8 and on the y z - yz- plane is a line of slope 3 3 (i.e. Δ y Δ z = 3 ). ΔyΔz=3). Consider the first component of r ( t ) r(t) is t .