Since we have 3 variables, it is a 3 × 3 matrix. Problem 1 For many people, breakfast cereal is an important source of fiber in their diets. By using this website, you agree to our Cookie Policy. Regression Formula: Regression Equation (y) = a + bx. The regression calculator above will compute all four types of simple regression along with the correlation coefficients of each curve so that you can see which line or curve fits best. It does not give only the regression equation of x on y and also it will give you the slope, arithmetic means of … Using the Regression Equation to Calculate Concentrations. Linear Least Squares Regression Line Equation Calculation Calculates the Slope(m), Y - intercept and Least Square Regression Line Equation.