# Equations: point slope

find the equation of the line below arrange your answer in the form y=mx+b where b is constant (-2,2) (2,2)

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You might have seen the form , where is the gradient, is the y intercept (where the line crosses the y axis).
If we knew , then we could substitute the values we have and rearrange the equation to find .
How do you think we could find the gradient between those 2 points?

13 June 2012

you can write the equation of the line in two point form, assume the given points as (x1, y1) & (x2, y2), then write the equation of line as:

13 June 2012

(y-y1) = m (x-x1) ; where m = (y2-y1)/(x2-x1) ... to explain further i can tell you that assume (x1, y1) = (-2,2) & (x2, y2) = (2,2)

13 June 2012

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