of the vertex. Because an absolute value function has a vertex, the general form is y = a0x-h0 + k. The vertical stretch or compression factor is 0a 0, the vertex is located at (h, k), and the axis of symmetry is the line x = h. Key Concept General Form of the Absolute Value Function Problem 1 Analyzing the Graph of f (x) ˜ d When f (x) ˚ ˛x˛