Willie Crash was out Sunday flying in his spaceship. As he approached Mars, he changed his mind, and decided that he did not wish to visit that planet and fired his retro-rocket. The spaceship slowed down, and if all went well (or did it?), stopped for an instant then started pulling away. While the rocket motor was firing, Willie's distance, d, from the surface of Mars depended by a quadratic function on the number of minutes, t, since he started firing the retro-rocket. Willie finds that at time t= 1, 2, and 3 minutes, his distances were d= 425, 356, and 293 kilometers, respectfully. what is the INDEPENDENT variable? (t or d)

what is the DEPENDENT variable? (t or d)

what does the INDEPENDENT variable represent? 1. the distance D from the surface of Mars OR 2.The number of minutes Titi since he started firing the retro-rocket