How do I find the x-intercept or the y-intercept?

The x-intercepts are where the graph crosses the x-axis
To find the x-intercepts of an equation --> substitute in y = 0 and solve for x

The y-intercepts are where the graph crosses the y-axis
To find the y-intercepts of an equation --> substitute in x = 0 and solve for y

e.g. y = x2 + 4x + 3

1)To find the x-intercept

Let y=0, then x2 + 4x + 3 = 0. 
Now, solve for x, which gives x= 1 , 3     [working excluded here]

So the x-intercept occurs at (1,0), (3,0)

2)To find the y-intercept

Let x=0, then y=3

So the y-intercept occurs at (0,3)

[Would draw graph to highlight answer]

Answered by Sundeep U. Maths tutor

5297 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

The length of a rectangle is x+5 and the width is x+3. Write an equation for the area of the rectangle.


How do you work out the old price of an item having been given the new price after a specified percentage change?


Solve x^2 = 4(x – 3)^2


Solve the following simultaneous equations 7x - 6y =38 and 3x + 9y =-3


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