How to find the equation of a line from a graph?

Location of two points that lie on the line is needed to define an equation of the line. The general equation of a line is in the form y = mx + c, where m is the gradient of the line and c is the y coordinate of the point where the line intercepts the y-axis. Gradient (slope) is defined as the change in Y/ change in X. We substitute the gradient of our line for m and the y coordinate of the y-axis intercept for c to get the equation of the line. When a value of an x coordinate of a point is substituted for x in the equation, the result that we will get after solving for y is the y coordinate of a point that lies on the line.

TK
Answered by Tomas K. Maths tutor

2850 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

How to differentiate a function?


A right angled triangle with sides 7cm and 11cm, find the hypotenuse


Make a the subject of the formula p = (3a + 5)/ (4 - a)


Jay, Sheila and Harry share £7200 in the ratio 1 : 2 : 5. How much does Harry receive?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences