Question

What is the difference between a tangent and secant?

Answer 1

• A secant line connects twopoints on a curve. The slope of a secant line is the average rate of change between two points on a curve.
  
• A tangent line touchesonepoint. The slope of a tangent line is the instantaneous rate of change at a single point on a curve. The slope of a tangent line at a point is a derivative at that point.