1 Introduction
1.1 Tangent and Secant
A tangent line just touches a curve at a point, matching the curve’s slope there. A secant line intersects two or more points on a curve. See figure 1.1

Figure 1.1: A secant and Tangent
A tangent line just touches a curve at a point, matching the curve’s slope there. A secant line intersects two or more points on a curve. See figure 1.1

Figure 1.1: A secant and Tangent