This video is a quick walkthrough of how to answer perpendicular line questions for GCSE maths, and is aimed at around grade 6 …. please do

– stop the video

– work through the questions

– compare your solutions

I hope the video helps and please do leave a comment – thanks!

Download a copy of the questions here:

Here's a copy of the written answers:

QT Perpendicular lines ANSWERS

1. Write down the equation of a line perpendicular to y = 4x + 6

2. Write down the equation of a line perpendicular to y = 4x + 6 which passes through (0, -4)

3. Find the equation of a line perpendicular to 4y – 2x + 8 = 0

4. Find the equation of a line perpendicular to y = -43x – 6 which passes through (0, 3)

5. Find the equation of a line perpendicular to 2y – 3x + 5 = 0 which passes through (0, -4)

6. Line A passes through the points (4,3) and (8,6). Find the equation of the line perpendicular to line A that passes through (6,12)

7. Line A passes through the points (1,1) and (4,7) Line B passes through the points (7,4) and (11,6) Determine whether Line A and line B are perpendicular.

8. Line A passes through the points (-5,-1) and (-1,11) Line B passes through the points (-4,1) and (k, 5) Line A and B are perpendicular. Find the value of k.

Here's the timestamp:

0:00 Intro

0.58 Question 1

2:40 Question 2

3:10 Question 3

5:00 Question 4

5:50 Question 5

7:38 Question 6

10:40 Question 7

13:10 Question 8

These types of questions appear in all the main GCSE exam boards – Edexcel, AQA, OCR and Educas – and are fairly common for non calculator papers.

**Top Tips!**

- Always work methodically and show your working
- Check your calculations
- Is it a reasonable answer?

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Please do leave a comment below if you are not sure. Alternately you can view my YouTube channel and leave a comment there – I'll always try to respond as quickly as possible.

Watch on YouTube:

Perpendicular Lines – GCSE Maths Grade 5

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