Slope of the Tangent Line (darker slopes for visibility)
Points A and C are moveable.
The tangent to the graph of f(x) = x^2 at the point C is in blue. The slope of this tangent line is in blue and designated as mTan.
The secant line connecting points A and C is in green. The slope of this secant line is in green and designated as mSec.
1. Select a location for point C.
2. Move point A towards point C.