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Warm-up

Warm-up. Warm-up. Y- int : (0,-3). Sym.Pt : (2, -3). V: (1, -4). 4.2 Graphing Parabolas. Objective: Students will graph in vertex form or intercept form. Vertex form of a parabola. 1. Vertex is (h,k). 2. Axis of symmetry is x=h. 3. The graph opens up if a > 0 and down if a < 0.

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Warm-up

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  1. Warm-up

  2. Warm-up Y-int: (0,-3) Sym.Pt: (2, -3) V: (1, -4)

  3. 4.2 Graphing Parabolas Objective: Students will graph in vertex form or intercept form

  4. Vertex form of a parabola 1. Vertex is (h,k) 2. Axis of symmetry is x=h 3. The graph opens up if a > 0 and down if a < 0.

  5. JUST Watch--Graph the following parabola in vertex form: x = 1 y = (x - 1)2 -3 axis of symmetry: vertex: (0, -2) (2, -2) (1, -3) y-intercept: Symmetry point:

  6. Fill in on notes 4.2--Graph the following parabola in vertex form: x = 3 y = (x - 3)2 - 5 (0, 4) (6, 4) axis of symmetry: vertex: (3, -5) y-intercept: Symmetry point:

  7. Graph the following parabola (-2, 5) y = -3(x + 2)2 + 5 axis of symmetry: vertex: (0, -7) (-4, -7) x = -2 y-intercept: Symmetry point:

  8. Classwork Page 246 (1-3)

  9. Graphing Parabolas 1. The x-intercepts are p and q. 2. The axis of symmetry is In Intercept Form 3. The graph opens up if a > 0 and down if a < 0.

  10. JUST Watch--Graph the following parabola x = 5 0 y = (x - 1)(x - 9) (0, 9) x-intercepts: (1, 0) (9, 0) axis of symmetry: (5, -16) vertex: y-intercept:

  11. Fill in on notes 4.2--Graph the following parabola x = 1 0 y = (x – 4)(x + 2) x-intercepts: (-2, 0) (4, 0) (0, -8) axis of symmetry: (1, -9) vertex: y-intercept:

  12. Change Y-axis scale to 2--Graph the following parabola 0 y = -2(x + 1)(x - 5) (2, 18) (0, 8) x-intercepts: (-1, 0) (5, 0) axis of symmetry: x = 2 vertex: y-intercept:

  13. Classwork Page 247 (5-8)

  14. Homework Page 249 # 6-8, 16-18 HW (4.1-4.2) p. 1013 # 1-8

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