In this lesson, you learned how to:

• Write an equation of a line parallel to a given line.
• Write an equation of a line perpendicular to a given line.
• Write an equation of a line parallel or perpendicular to an axis.
• Write an equation of a line in slope-intercept form given two points.

Here are the activities that helped you reach those goals:

• 1.14.1: Using Point-Slope Form to Write the Equation of a Line 
  • In this activity, you used the slope formula to find the slope of a line. Using the slope and a point, you wrote equations in point-slope form and slope-intercept form.
• 1.14.2: Writing Equations for Point-Slope and Slope-Intercept
  • In this activity, you wrote an equation of a line in slope-intercept form given two points.
  • 1.14.2: Self Check
  • 1.14.2: Additional Resources
• 1.14.3: Writing an Equation of a Line Parallel to a Given Line
  • In this activity, you explored parallel lines that have the same slope. You also wrote the equation of lines parallel to given lines that went through a specific point.
  • 1.14.3: Self Check
  • 1.14.3: Additional Resources
• 1.14.4: Writing an Equation of a Line Perpendicular to a Given Line
  • In this activity, you explored perpendicular lines that have slopes that are opposite reciprocals of each other. You wrote the equations of lines that were perpendicular to a given line and went through a specific point.
  • 1.14.4: Self Check
  • 1.14.4: Additional Resources
• 1.14.5: Writing an Equation of a Line Parallel or Perpendicular to an Axis
  • In this activity, you wrote equations of lines parallel or perpendicular to an axis through a given point, given a line in the form $x=a$ or $y=b$.
  • 1.14.5: Self Check
  • 1.14.5: Additional Resources
• 1.14.6: Drawing Parallel and Perpendicular Lines
  • In this activity, you worked with a partner to draw parallel and perpendicular lines on a coordinate plane.

After these activities, you completed the following practice:

• 1.14.7: Practice