What you will learn :

4A Introducing linear relationships 
4B Graphing straight lines using intercepts 
4C Lines with only one intercept 
4D Gradient 
4E Gradient and direct proportion 
4F Gradient–intercept form 
4G Finding the equation of a line using y = mx + b 
4H Midpoint and length of a line segment from diagrams 
4I Perpendicular lines and parallel lines 
4J Linear modelling 
4K Graphical solutions to linear simultaneous equations 

Outcomes

A student determines the midpoint, gradient and length of an interval, and graphs linear relationships.
A student uses the gradient–intercept form to graph linear relationships.
A student uses formulas to find midpoint, gradient and distance on the Cartesian plane, and applies standard forms of the equation of a straight line.