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: 2 times -3/4 is -6/4, and dividing by this is the same as multiplying by -4/6.
19: b is -12, not 12.
21: k is the minimum value if the parabola opens upward or the maximum value if the parabola opens downward.
31: Parabolas are symmetrical, so if you move the same distance to the right or to the left of the vertex, the new y value will be the same either way.
44: -b/2a is h, the x-coordinate of the vertex.
52: How does the graph change when a value is subtracted from x or added to the expression?