Students learn how to work out the gradient perpendicular, straight line graphs.
Later, as learning progress they are challenged to derive the equation of perpendicular graphs in the form y = mx + c.
In this lesson there are five grade 8 and 9 maths problems for higher ability students.
Calculating the speed, distance and time for two part journeys.
Connecting permutations, number properties and money to deepen students understanding of place value.