Tangent and Normal Lines

A Tangent Line is a line which locally touches a curve at one and only one point.

Talking about the line let us recall some of the terms together:

• The slope-intercept formula for a line is y = mx + b, where m is the slope of the line and b is the y-intercept.
• The point-slope formula for a line is y – y₁ = m (x – x₁). This formula uses a point on the line, denoted by (x₁, y₁), and the slope of the line, denoted by m, to calculate the slope-intercept formula for the line.

Learn more about tangent and normal lines by reading the explanation below.

Tangent and Normal Lines

Practice:  Answer the following exercises about tangent and normal lines.