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

5301 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

If L1 is y = 3x + 15 and L2 is 3y + 20 = 9x show whether or not L1 and L2 are parallel.


2017 Edexcel Summer 2017 Q18) 16^1/5 × 2^x = 8^3/4 Work out the exact value of x


Complete this substitution question: x^​3 - 25 = 103 - x^​3


Write 0.319319... as a fraction in its lowest terms


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