Linear Relationships
Vertical and Horizontal Lines
Expanding and Factorising
Solving linear equations {revision} Coordinate geometry 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 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.
All vertical lines have equations in the form x=a. The gradient of a vertical line is undefined.