An object starts (t = 0) at the point (2, -3) and travels along a straight line connecting to the point (-1, 1) where x and y are measured in meters. The object moves down the line at a constant velocity of 15 m/s. Find the parametric system of equations that describes the position of this object in terms of time t in seconds. Write answer as an ordered pair, and be sure to enclose your answer in parenthesis.