Let [math].

(A) Find the slope of the secant line joining [math] and [math].

Slope of secant line =

(B) Find the slope of the secant line joining [math] and [math].

Slope of secant line =

(C) Find the slope of the tangent line at [math].

Slope of tangent line =

(D) Find the equation of the tangent line at [math].

[math]

Your overall score for this problem is