NumericalEasy1 mark
5(ii)
Line AB is perpendicular to CD coordinates of B, C and D respectively (4, 0), (0, –1) and (4, 3). Find
Equation of AB
Topic: Slope and equation of a line
Previous-year question practice database
Answer
Exam answer
Equation of AB: y = −x + 4, i.e. x + y − 4 = 0.
Explanation
AB ⟂ CD, so slope AB = −1. It passes through B(4,0): y−0 = −1(x−4).
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