# Deriving the Equation of Perpendicular Lines

## Deriving the Equation of Perpendicular Lines

Students learn how to work out the gradient perpendicular, straight line graphs.

Later, as learning progress they are challenged to derive the equation of perpendicular graphs in the form y = mx + c.

##### Differentiated Learning Objectives
• All students should be able to calculate the gradient of perpendicular lines.
• Most students should be able to calculate the equation of a perpendicular line.
• Some students should be able to calculate the equation of lines in the form ax + by + c = 0.

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