Calculating the slope of a series of values

Question

I have 2 arrays of equal length. The following function attempts to calculate the slope using these arrays. It returns the average of the slope between each points. For the foll

Answer 1

You should be dividing by x_values.length - 1 . Number of slopes is pairwise.

Edit : Wiki example in my comments shows how to calculate the alpha and beta which determines the slope of the linear regression line.