# Quadratic Graphs

*how to bend a line with a square*

Here is the graph of the linear equation y = bx+c. Use the sliders of b and
c to change the line.

Now add the term ax^2 to form a quadratic equation and graph. Slowly adjust
the value of a from 0 and note how you gradually 'bend' the straight line.
Describe how the term ax^2 makes the change.