3.2 Graphing Quadratic Functions in Vertex Form. Quadratic Function. A function of the form y=ax 2 +bx+c where a ≠0 making a u-shaped graph called a parabola . Example quadratic equation:. Vertex-. The lowest or highest point of a parabola. Vertex Axis of symmetry-
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Example quadratic equation:
of a parabola.
Axis of symmetry-
If a is negative, parabola opens down.
the left side of the vertex.
y = (x + 4)2 - 3.
X = 1
where x is the horizontal distance (in feet) from the left tower and y is the corresponding height (in feet of the cable). Find the distance between the towers.