Finding quadratic equation


bouncing balls
1. Given three points, solve system of three equations using general form:
(1)   y1 = ax1² + bx1 + c
(2)   y2 = ax2² + bx2 + c
(3)   y3 = ax3² + bx3 + c
to find (a, b, c)

2. Given two x-intercepts, p and q, and a point, solve for "a" using intercept form:
y = a(x - p)(x - q)

3. Given vertex, (h, k), and a point, solve for "a" using vertex form:
y = a(x - h)² + k

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