# Findng the Y-Intercept of a Line(KS3, Year 9)

## The Lesson

The y-intercept of a line is the y-coordinate of the point where the line crosses the y-axis. Imagine a line is drawn on a graph. We can find the y-intercept of the line.

## How to Find the Y-Intercept of a Line

Finding the y-intercept of a line is easy.

## Question

Find the y-intercept of the line shown below. # 1

Find where the line crosses the y-axis. # 2

Read off the y-coordinate of the point where the line crosses the y-axis. In our example, the line crosses the y-axis at a y-intercept of 1. The y-intercept is 1.

## Lesson Slides

The slider below gives a real example of how to find the y-intercept of a line. Open the slider in a new tab

## Positive, Zero and Negative Y-Intercepts

A positive y-intercept means the line crosses the y-axis above the x-axis: A zero y-intercept means the line crosses the y-axis at the origin: A negative y-intercept means the line crosses the y-axis below the x-axis: ## Interactive Widget

You can use this interactive widget to create a graph of a linear equation and see its y-intercept. Use the buttons to change the values of the linear equation.
Change the Equation
y
x
y-intercept