Factored Form: y = ax2 + bx + c

  • a: determines whether the parabola opens up or down and how steep the curve is

  • c: y-intercept

Match each definition below to the graph it describes.

y = - x2 - 4x - 3

1

A

parabola passing through the points (-2, -3), (0,-7) and (2,5)

y = 2x2 + 2x - 7

2

B

parabola passing through the points (-5,2), (-3,-2) and (0,7)

y = x2 + 5x + 3

3

C

parabola passing through the points (-4, 3), (-2,7) and (0,3)

y = x2 + 6x + 7

4

D

parabola passing through the points (-2,-3), (0,7) and (3,-8)

y = - 2x2 + x + 7

5

E

parabola passing through the points (-5,3), (-4,-1) and (0,3)

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