## Linear Relationships

Vertical and Horizontal Lines

Expanding and Factorising

*Solving linear equations {revision}*

*Coordinate g*

*eometry*

*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

All horizontal lines have equations in the form of

All vertical lines have equations in the form

*y=c*. The gradient of a horizontal line is zero.All vertical lines have equations in the form

*x=a*. The gradient of a vertical line is undefined.