19990401kkkkk Quadratic/Cubic/Quartic Regression GraphA quadratic/cubic/quartic regression graph represents connection of the data points of ascatter diagram. It uses the method of least squares to draw a curve that passes close to asmany data points as possible. The formula that represents this is quadratic/cubic/quarticregression.Ex. Quadratic regression4(CALC)e(Quad)6(DRAW)Quadratic regressionModel formula ..... y = ax 2 + bx + ca ............. regression second coefficientb ............. regression first coefficientc ............. regression constant term (intercept)Cubic regressionModel formula ..... y = ax 3 + bx 2 + cx + da ............. regression third coefficientb ............. regression second coefficientc ............. regression first coefficientd ............. regression constant term (intercept)Quartic regressionModel formula ..... y = ax 4 + bx 3 + cx 2 + dx + ea ............. regression fourth coefficientb ............. regression third coefficientc ............. regression second coefficientd ............. regression first coefficiente ............. regression constant term (intercept)6-3-7Calculating and Graphing Paired-Variable Statistical Data
