# How do you write an equation of a line going through (-5,-5), and (-2,3)?

##### 1 Answer

Explanation given in detail to demonstrate methods. Shortcuts would reduce the method considerably!

#### Explanation:

Let the point be

Let the point be

Let the gradient (slope) be

Let the constant be

The standardised equation for a strait line graph is:

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Substitute for m in equation (1) giving:

'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

At this stage if we substitute known value for

Substitute

Add

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Substitute for