Tracing the Vertex of a Parabola
Author: cwl

y=ax²+bx+c

Predict the path of the vertex of the parabola as you 
change its equation.

a = 0.8 (slider from -5 to 5, step 0.1)
b = -1.7 (slider from -5 to 5, step 0.1)
c = 1 (slider from -5 to 5, step 0.1)
d: 1.0 * 1.0 y = a * 1.0 * 1.0 x^(2.0) + b * 1.0 * 1.0 x + c
A: (-1.0 * 1.0 * b / (2.0 * a), a * (-1.0 * 1.0 * b / (2.0 * a))^(2.0) - b^(2.0) / (2.0 * a) + c)