Linear Regression

• You might also want to see how two variables are correlated.
• For instance, you want to see if age is correlated to education.
• This means your input is with pairs of data (age education).
• In my case the pair is 43-22 meaning I'm 43 and I've had 22 years of school.
• The formula for corrlelation is r = (N* sum(xy)-(sum(x)*sum(y)))/ sqrt[(N(sum(x*x))- (sum (x))^2)][N(sum (y*y))-(sum(y))^2]
• Let me expand it.
• Though I can program it, I don't really feel how it works.
• I find that plugging through some examples helps.
• However, in this case, I don't want to plug through an example.
• I slammed in some data into Excel, used slope and intercept and got the line.
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