Almost every coordinate geometry question is really a gradient question. Get the gradient right and the equation of the line follows.
Coordinates and Linear Graphs
Coordinates fix a point on a grid: how far across first, then how far up. This topic covers plotting points in the four quadrants, drawing a straight line from a table of...
7 questions · 19 marks
Revise this topicGradient of a Line
The gradient of a straight line measures how steep it is: the rise divided by the run. Core questions give you a grid to read it from, and the Extended paper also gives y...
7 questions · 16 marks
Revise this topicLength and Midpoint
Two calculations sit in this subtopic, and both start from the coordinates of the two ends of a segment. The length comes from Pythagoras' theorem applied to the horizont...
7 questions · 18 marks
Revise this topicEquations of Lines
Every straight line that is not vertical has an equation of the form , and this subtopic is about finding it. You will read the gradient and the intercept o...
7 questions · 20 marks
Revise this topicParallel and Perpendicular Lines
Parallel lines share the same gradient, so the equation of a parallel line is found by keeping and working out the new intercept. Perpendicular lines are the Extend...
7 questions · 19 marks
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