// This program computes two slopes and prints them.

public class SeveralSlopes {
    public static void main(String[] args) {
        double s1 = slope(0, 0, 5, 10);
        double s2 = slope(5, 10, 20, 15);
        
        System.out.println("The slopes are " + s1 + " and " + s2);
        
        // System.out.println("The slopes are " + slope(0, 0, 5, 10) + " and " + 
        //                    slope(5, 10, 20, 15));
    }
    
    // Returns the slope of the line between the given points.
    //                              0       0       5      10
    public static double slope(int x1, int y1, int x2, int y2) {
        double dy = y2 - y1;    // 10.0
        double dx = x2 - x1;    //  5.0
        
        double s = dy / dx;     //  2.0
        return s;
    }
}