Secant lines (K-A)

• Slope of a line secant to a curve (K-A)
• Secant line with arbitrary difference (K-A)
• Secant line with arbitrary point (K-A)
• Secant line with arbitrary difference (with simplification) (K-A)
• Secant line with arbitrary point (with simplification) (K-A)
• Secant lines: challenging problem 2 (K-A)