R-squared values range from 0 to 1, indicating the fit and explanatory power of a regression model. Values below 0.3 suggest weak explanatory power; above 0.7 indicate strong relationships.

The inverse of squaring is square root. Divide both sides of the formula by π. The formula is now 𝑨/π = 𝒓2 Square root both sides of the formula. The formula is now √(𝑨/π ...