class SimpleRegression implements Serializable, UpdatingMultipleLinearRegression {

    public void clear() {
        sumX = 0d;
        sumXX = 0d;
        sumY = 0d;
        sumYY = 0d;
        sumXY = 0d;
        n = 0;
    }

    public  SimpleRegression();
    public  SimpleRegression(boolean includeIntercept);

}