(vii) Co-ordinate Geometry — (b)(ii) Equation of a line:
- Slope –intercept form y = mx + c
- Two-point form (y - y₁) = m(x - x₁)
- Geometric understanding of 'm' as slope/ gradient/ tanθ where θ is the angle the line makes with the positive direction of the x axis.
- Geometric understanding of 'c' as the y-intercept/the ordinate of the point where the line intercepts the y axis/ the point on the line where x=0.
- Conditions for two lines to be parallel or perpendicular.
Simple applications of all the above.