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Lesson 2 Feb 11 2010

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Lesson 2 Feb 11 2010

  1. 1. On the same graph Graph f(x) = x 2 Graph f(x) = ­ x2
  2. 2. y = x2 y = ­x2
  3. 3. y = 1 y =
  4. 4. 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.
  5. 5. Exercise 2 Omit #9, and #10

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