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Chapter 8 Math Vocab

Graphing Quadratic Functions

Quadratic Function a nonlinear function that can be written in the standard form y=ax^2+bx+c, where a is not equal to 0
Parabola the u-shaped graph of a quadratic fuction
Vertex the lowest or highest point on a parabola
Axis of Symmetry the vertical line that divides a parabola into two symmetric parts
Focus a fixed point on the interior of a parabola that lines on the axis of symmetry; a parabola "wraps" around the focus
Zero an x-value for which f(x) =0; located at the x-intercept of the graph of the function
Minimum Value the y-coordinate of the vertex of the graph of y=ax^2+bx+c when a>0
Maximum Value the y-coordinate of the vertex of the graph of y=ax^2+bx+c when a<0
Vertex Form a quadratic function of the form y=a(x-h)^2+k, where a is not equal to 0. the vertex of the parabola is (h,k)