# Slope of the tangent on a quadratic

- Author:
- Lee W Fisher

Move the value of

*a*along the slider to move the point A (*a*, f(*a*)) along the curve. Look for the value of the slope of the tangent. Notice that for whatever the value of*a*, the slope of the tangent is 2*a*-2, which is the derivative of the function.## New Resources

Download our apps here: