5 - straight line graphs

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6 Terms

1
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equation for straight line graphs

y = mx + c

2
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how else can straight line graph equations be written

all equal to 0

3
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equation to find gradient of line

rise/run

4
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equation to find midpoint of line

(x1+x2)/2 and same for y values

(find mean of them)

5
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how to find equation once you already have the gradient

m(x-x1) = y-y1

6
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limitation of a linear model

assuming the y value goes up by the same amount for each unit increase in x