Difference between revisions of "Directly Proportional"
| Line 20: | Line 20: | ||
===References=== | ===References=== | ||
====AQA==== | ====AQA==== | ||
| + | |||
| + | :[https://www.amazon.co.uk/gp/product/019835939X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=019835939X&linkCode=as2&tag=nrjc-21&linkId=57e96876985fc39b1a3d8a3e3dc238b6 ''Directly proportional, pages 158-159, 282, GCSE Physics; Third Edition, Oxford University Press, AQA ''] | ||
| + | |||
| + | |||
| + | ===References=== | ||
| + | ====AQA==== | ||
| + | |||
:[https://www.amazon.co.uk/gp/product/019835939X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=019835939X&linkCode=as2&tag=nrjc-21&linkId=57e96876985fc39b1a3d8a3e3dc238b6 ''Directly proportional, pages 158-159, 282, GCSE Physics; Third Edition, Oxford University Press, AQA ''] | :[https://www.amazon.co.uk/gp/product/019835939X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=019835939X&linkCode=as2&tag=nrjc-21&linkId=57e96876985fc39b1a3d8a3e3dc238b6 ''Directly proportional, pages 158-159, 282, GCSE Physics; Third Edition, Oxford University Press, AQA ''] | ||
Revision as of 09:23, 4 November 2019
Contents
Key Stage 4
Meaning
When two variables are directly proportional when one variable is multiplied by a factor, the other variable is multiplied by the same factor.
About Direct Proportionality
- A scatter graph showing a directly proportional relationship has a linear gradient that passes through zero, it has a y-intercept of zero.
- On a proportional scatter graph when one variable doubles, the other doubles or when one triples the other triples.
Examples
 |
This scatter graph shows a linear relationship that is directly proportional where x doubles, y doubles.
\(y = mx\) Where m, the gradient, is positive. |
References
AQA
- Directly proportional, pages 158-159, 282, GCSE Physics; Third Edition, Oxford University Press, AQA