# Y-intercept

## Contents

## Key Stage 3

### Meaning

The y-intercept is where the line on a scatter graph meets the y-axis.

## Key Stage 4

### Meaning

The y-intercept is where the line on a scatter graph meets the y-axis.

### About the y-intercept

- If an experiment produces a scatter graph with a y-intercept but the relationship is supposed to be directly proportional then the y-intercept indicates the amount of systematic error in the experiment.

### References

#### AQA

*Y-intercept, page 302, GCSE Combined Science Trilogy; Biology, CGP, AQA**Y-intercept, page 381, GCSE Biology, CGP, AQA*