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y2 - y1

-------- = Gradient <----- that is the formula to slope in y=Mx+b

x2 - x1

Gradient is change in Y divided by change in X. X is your field value(kilometers, miles, feet, etc) and Y is the units of your isolines(degrees, feet, meters, etc)

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13y ago

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Q: What is the equation for gradient?
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