1. How can you tell if the parabola opens upward or downward?

4. See the first slide.

10. Find `h` by dividing -24 by 2(-6), and then plug `h` in to find `k`.

12. Dividing by 2(-3/4) is multiplying by -8/6.

19. The error involves a negative.

21. The minimum or maximum value is the `k` value of the vertex.

31. Parabolas are symmetrical.

44. -`b`/2`a` is the `x` coordinate of the vertex.

52. How does the graph change when a value is subtracted from `x` or added to the expression?