Quadratic Function Exploration

This applet will allow you to explore the relationships of a, b, and c on the function f(x)=a(x+b)²+c. Each variable affects the function in a different way.

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As c increases/decreases, what happens to f?
What about b?
How does the the sign (+/-) of a change f?

Scott W. Hale, Created with GeoGebra