Linear Relationships
Perpendicular slopes

Expanding and Factorising

Solving linear equations {revision}

• Solving basic linear equations​
• Solving more complex linear equations
• Unknowns on both sides

Coordinate geometry

• Finding the distance between two points
• Finding the midpoint between two points

Graphs of linear equations

• Finding the gradient (slope) of a line
• Perpendicular slopes
• Graphing linear equations (slope-intercept form)
• Finding the equations of linear graphs in slope-intercept form (part 1)
• Finding the equations of linear graphs in slope-intercept form (part 2)
• Graphing linear equations (general form)
• Vertical and horizontal lines​

A perpendicular slope is a slope formed from a line that is at right-angles to the original slope. If the original slope is known, then the perpendicular slope can be found by flipping the fraction and changing the sign.