key term - Tangent

Definition

A tangent line is a straight line that touches a curve at only one point and has the same slope as the curve at that point.

Related terms

Derivative:

The derivative represents the slope of the tangent line to a curve at any given point.

Normal Line: The normal line is perpendicular to the tangent line and passes through the same point on the curve.

Secant Line:

A secant line intersects with two points on a curve, while passing through other points between them.