click below
click below
Normal Size Small Size show me how
9-2
| Question | Answer |
|---|---|
| Form of equation | Y=a(x-h)^2+k |
| Form of equation 2 (equal to x) | x=a(y-k)^2+h |
| Vertex | (h,k) |
| Direction of opening | a>0 opens up or opens right depending on the equation. 0>a is opens down or left |
| Axis of symmetry for first form of equation (y=) | x=h |
| Axis of symmetry for second form (x=) | y=k |
| Focus for first form (y=) | (h, k+1/4a) |
| Focus for second form (x=) | (h+ 1/4a, k) |
| Directrix for first form (y=) | y= k-1/4a |
| Directrix for second from (x=)` | x= h-1/4a |