### Line.java

public class Line
{
private double slope;
private double yIntercept;
/**
Construct a line with equation y = mx + b
@param aSlope the slope of this line
@param aYIntercept the y intercept of this line
*/
public Line(double aSlope, double aYIntercept)
{
slope = aSlope;
yIntercept = aYIntercept;
}
/**
Checks whether a point is contained on the line
@param x the x-coordinate of the point
@param y the y-coordinate of the point
@return true if (x,y) is contained in the line
*/
public boolean contains(double x, double y)
{
return Math.abs(x * slope + yIntercept - y) < EPSILON;
}
/**
Gets the slope of this line
@return the slope
*/
public double getSlope()
{
return slope;
}
/**
Gets the y intercept of this line
@return the y intercept
*/
public double getYIntercept()
{
return yIntercept;
}
/**
Checks whether this line intersects with another.
@param other another line
@return true if this line and other intersect
*/
public boolean intersects(Line other)
{
// your work here
}
private static final double EPSILON = 1E-12;
// this method is used to check your work
public static boolean check(double slope1, double yIntercept1,
double slope2, double yIntercept2)
{
Line first = new Line(slope1, yIntercept1);
Line second = new Line(slope2, yIntercept2);
return first.intersects(second);
}
}