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Linear Extrapolation and Interpolation from values

Linear Extrapolation and Interpolation from values

With this simple application, you can estimate a value that are between or outside 2 known points.
Usually used for find the mean value, or a predicted value etc.
$$ x_0 = $$ known input value
$$ y_0 = $$ known output value
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$$ x_1 = $$ known input value
$$ y_1 = $$ known output value
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$$ x_2 = $$ known input value
$$ y_2 = \frac{y_1-y_0}{x_1-x_0} \cdot (x_2-x_0) + y_0 = $$ Output value