LineSlope.java

package com.example.slope;

public class LineSlope {

    private double a, b, c, d, slope;


    // use the parameters to assign your instance variables
    public void set_coordinates(double x1, double y1, double x2, double y2) {
        a = x1;
        b = y1;
        c = x2;
        d = y2;
    }


    // calculate the slope using your instance variables
    public void calculate_slope() {
        slope = Math.abs(b - d) / Math.abs(a - c);
    }


    // print the slope you calculated in calculate_slope
    public void display_slope() {
        System.out.println(slope);
    }

    public static void main(String[] args) {

        LineSlope runner = new LineSlope();

        // this line should have a slope of 2
        runner.set_coordinates(3, 3, 7, 11);
        runner.calculate_slope();
        runner.display_slope();

        // this line should have a slope of -.75
        runner.set_coordinates(0, -2, -4, 1);
        runner.calculate_slope();
        runner.display_slope();

    }
}