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Knowing this we can work out the equation of a straight line:
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| m | = |
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= | 2 |
| Therefore | y = 2x + 1 |
| m | = |
|
= | 3 |
| Therefore | y = 3x |
You can see the effect of different values of m (the slope) and b (the y intercept) at Explore the Straight Line Graph
Different Countries teach different "notation":
| In the US the notation is: | y = mx + b |
| In the UK and Malaysia the notation is: | y = mx + c |
| In Denmark: | y = ax + b |
| In your country: | let us know! |
... but it all means the same thing, just different letters.
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