Roxy stands on a level plain. With her position at coordinates (0, 0), the function that models the path of a rock she throws is given below. How high above the plain is the peak height of the rock? How far horizontally from Roxy does the rock land back on the plain?
Ximena is skateboarding at a park that features a ramp in the shape of a parabola. If she stands at the top of the ramp and is given coordinates (0, 0), the equation of the ramp is given below. How far below her is the lowest point on the ramp? How far from her horizontally is the top of the ramp on the other side?