Exponential and Logarithmic Functions: Background You’ll Need 2

  • Write the equation of horizontal and vertical lines given their graphs

Writing Equations of Horizontal and Vertical Lines

horizontal and vertical lines

  • A horizontal line has the equation [latex]y=c[/latex] and is flat, running left to right across the coordinate plane.
  • A vertical line has the equation [latex]x=c[/latex] and goes straight up and down on the coordinate plane.

Write the equation of the line shown.

Horizontal line on coordinate plane through the y-axis at 3.

Write the equation of the line shown.

Vertical line on coordinate plane through the x-axis at negative 2.