how do you find the equation of a line perpendicular to another line at a point?

The gradient of the perpendicular line is the negative reciprocal of the gradient of the original line. For example if the gradient of the original line is 4, the gradient of the perpendicular line is -1/4. If the gradient of the original line is 1/2 , the gradient of the perpendicular line is -2 (=-2/1). The equation of the perpendicular line can then be found by substituting the gradient (m) and the given point (x,y) into the equation y=mx+c.(the reciprocal of a number is 1/that number)

FG
Answered by Frankie G. Maths tutor

2807 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

What is the value of tan(45)?


n is an integer such that 3n + 2 < 14 and 6n/(n^2+5) > 1. Find all possible values of n.


Simplify 4^2 x 2^4


John wants to invest £100 into a savings account for 15 years. If he invests in saving account A he will receive 3.5% simple interest and if he invests in savings account B he will receive 3% compound interest. Which account should he choose and why?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences