CAIE A-Level Mathematics 1.3.1 Straight lines

CAIE A-Level Mathematics 1.3.1 Straight lines
Cambridge International AS & A Level Mathematics 9709 syllabus for exams in 2028, 2029 and 20302028–2030

Practise forming straight-line equations from two points or from a point and gradient, using equivalent equation forms confidently.

How this is tested

  • calculate a gradient from two points, then form the line equation through either point

Question 11(a)

[Maximum number: 2]
Figure for Question 11(a) — CAIE A-Level Mathematics

The diagram shows the curve with equation x=y2+1x=y^{2}+1. The points A(5,2) and B(2,-1) lie on the curve.

Find an equation of the line A B.