Which set of points does NOT represent a function? A) (-2, 1), (6,3), (5, 1), (-4,6)
B) (-7,3), (1, 2), (5,3), (-7,2)
C) (-4,-3), (-1, 2), (0,5), (3, 2)
D) (-5, -1), (-2, -1), (1, -1), (4, -1)

Ahovercraft takes off from a platform. its height (in meters), xx seconds after takeoff, is modeled by: h(x)=-2x^2+20x+48h(x)=−2x 2 +20x+48 what is the maximum height that the hovercraft will reach?