getDistance(x, y) {
    const A = this.dy;
    const B = -this.dx;
    const C = this.dot;
    const D = A * x + B * y + C;

    return D / Math.sqrt(this.xxyy);
  }
Calculates the distance of a point from the line.
@param {number} x - The x-coordinate of the point.
@param {number} y - The y-coordinate of the point.
@returns {number} The distance from the point to the line.