lesson 2 feb 11 2010
TRANSCRIPT
Graph f(x) = x2 Graph f(x) = x2On the same graph
y = x2 y = x2
y =
y =
1
In general the following statements are true for each quadratic function of the type y = ax2:
1. Axis of symmetry is the yaxis, its equation is x = 0.2. Coordinates of the vertex are (0, 0).
3. If graph opens upward.
If , graph opens downward
4. If , graph is narrower than y = x2 (stretch) If , graph is wider than y = x2 (shrunk)
5. If a > 0, the minimum value of y is 0. If a < 0, the maximum value of y is 0.
Exercise 2
Omit #9, and #10