Regression formula is used to assess the relationship between dependent and independent variable and find out how it affects the dependent variable on the change of independent variable and represented by equation Y is equal to aX plus b where Y is the dependent variable a is the slope of regression equation x is the independent variable and b is constant. The equation of the parabola is y ax2 bx c where a can never equal zero. Using a calculator to perform a quadratic regression.
Quadratic regression is an extension of simple linear regression.
While linear regression can be performed with as few as two points whereas quadratic regression can only be performed with more data points to be certain your data falls into the U shape. N number of pairs of data. Next we will perform quadratic regression. Before we fit the quadratic regression model to the data we need to create a new column for the squared values of our predictor variable.