Gradient, equations of lines, parallel and perpendicular lines

What this note covers

1. Gradient as a constant rate of change
2. Gradient-intercept and point-gradient forms
3. Finding a line through two points
4. Parallel lines
5. Perpendicular lines and negative reciprocals
6. Intersections, direct proportion and line models

6 sections · 10 key terms & formulas · 6 common mistakes