Quadratic in General form
Investigating the "a" value
Click and drag the "a" value to the right. How does the parabola look when "a" equals 2? or 3? or 4 or 5? What does increasing the value of "a" do?
Drag the "a" value between 0 and 1. What does decreasing the "a" value, while keeping it positive, do to our parabola?
Drag the "a" value so that it is negative. How does this effect the shape of our parabola?
Investigating the c value.
Try increasing the c value. What happens? Try decreasing the c value. What happens? Describe what you see
Now move the "a" value and the "b" value to different positions. Now move the "c" value? What particular point on the parabola does the "c" value always coincide with?