Quadratic Function Notes f (x) = a(x − h)2 + k, a 6= 0 vertex = (h, k) axis of symmetry: x = h a > 0 → concave up a < 0 → concave down h > 0 → h units to the right h < 0 → |h| units to the left k > 0 → k units up k < 0 → |k| units down
f (x) = ax2 + bx + c ³ ³ ´´ −b Vertex = −b , f 2a 2a To solve for x-intercept: let f (x) = 0 and solve for x To solve for f (x)-intercept: let x = 0 and solve for f (x) Quadratic Formula: √ −b ± b2 − 4ac x= 2a
Created by: Matthew Westerhoff, 2006