[Verse 1] Two variables walking through the data maze X and Y coordinates scatter cross the page Independent predicts the dependent's game Watch the dots align when correlation's tame Draw one perfect line through the messy cloud That's regression speaking clear and loud [Chorus] Y equals A plus B times X, remember this equation A's the intercept where the line meets Y-axis station B's the slope that climbs or falls with every X progression Simple linear regression, straight line confession Slope and intercept, slope and intercept That's your regression alphabet [Verse 2] When X is zero, where does your line begin? That's the intercept, A, where it crosses in The slope tells stories of relationship strength For every unit X moves, Y changes this length Positive slope means climbing to the right Negative slope means falling out of sight [Chorus] Y equals A plus B times X, remember this equation A's the intercept where the line meets Y-axis station B's the slope that climbs or falls with every X progression Simple linear regression, straight line confession Slope and intercept, slope and intercept That's your regression alphabet [Bridge] Sales predict from advertising spend Temperature from altitude's trend Best fit line cuts through the noise Minimizing error is regression's choice Sum of squared residuals must be small That's how we find the line that fits them all [Chorus] Y equals A plus B times X, remember this equation A's the intercept where the line meets Y-axis station B's the slope that climbs or falls with every X progression Simple linear regression, straight line confession Slope and intercept, slope and intercept That's your regression alphabet [Outro] One line rules the scattered data's fate Two parameters seal the estimate CFA candidates know this tune by heart Linear regression is where predictions start
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