CAIE IGCSE Additional Math 7.1 Use Straight Line Equations Questions

Practise Cambridge IGCSE Additional Mathematics by calculating line gradients and finding intersections from coordinate equations.

Exam points

Calculate gradients from pairs of coordinate points.
Find intersections of straight lines by equating their equations.
Use coordinate geometry notation and exact values to report the required point or gradient.

[Maximum number: 2]

point A has coordinates ( -2,4 ).
The point B has coordinates (6,10).
The point C has coordinates (12,2).

Find the gradients of the lines A B, A C and B C.

Grad $A B=\frac{6}{8}$ oe

Grad $A C=-\frac{2}{14}$ oe

Grad $B C=-\frac{8}{6}$ oe B1 for 2 correct unsimplified

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