Contenu connexe Similaire à Alg2 lesson 6-6 (20) Plus de Carol Defreese (20) Alg2 lesson 6-61. Vertex form : y = a(x – h)2 + k Standard form: y = ax2 + bx + c -b2a -b2a Line of symmetry: x = ___ Vertex: ( ___ , f(____ )) Line of symmetry: x = h Vertex: (h, k) -b2a y-intercept = (0, c) y-intercept = (0, ah2 + k) 3. y = a(x – h)2 + k -a flip upside down a>1 skinny 0<a<1 wide +k shift up -k shift down +h shift left -h shift right 4. y = x2 Vertex: (0, 0) y = x2 + 2 Vertex: (0, 2) 5. y = x2 Vertex: (0, 0) y = x2 + 2 Vertex: (0, 2) y = x2 - 3 Vertex: (0, -3) 7. y = x2 Vertex: (0, 0) y = (x + 1)2 Vertex: (-1, 0) 8. y = x2 Vertex: (0, 0) y = (x + 1)2 Vertex: (-1, 0) y = (x – 2)2 Vertex: (2, 0) 9. y = x2 Vertex: (0, 0) y = (x + 1)2 – 3 Vertex: (-1, -3) 10. y = x2 Vertex: (0, 0) y = (x – 2)2 + 1 Vertex: (2, 1) 12. Write in vertex form. Then graphthe function. complete the square Vertex: (-1, 3) Example 6-2a 13. Write in vertex form. Then graphthe function. Vertex: (-3, -4) Example 6-2a 14. Write in vertex form, then graph the function. Vertex: (-1, 4) Opens down skinny Example 6-3a 15. Vertex: (1, 2) so and Write an equation for the parabola whose vertex is at (1, 2) and passes through (3, 4). Example 6-4a