如何用js检测直线坐标生成直线？

function generateLine(x1, y1, x2, y2) {
  // 计算斜率
  var slope = (y2 - y1) / (x2 - x1);

  // 计算截距
  var intercept = y1 - slope * x1;

  // 返回直线方程
  return "y = " + slope + "x + " + intercept;
}

// 示例坐标点
var x1 = 0;
var y1 = 0;
var x2 = 5;
var y2 = 10;

// 生成直线方程
var lineEquation = generateLine(x1, y1, x2, y2);
console.log(lineEquation);