xAtY = (line, y) => {
  let x = (line[2] - (line[1] * y)) / line[0]
  if (Number.isNaN(x)) {
    const org = origin(line)
    x = org[0]
  }
  return x
}
Determine the X coordinate of the given line at the Y coordinate.

The X coordinate will be Infinity if the line is parallel to the X axis.

@param {line2} line - line of reference
@param {Number} y - Y coordinate on the line
@return {Number} the X coordinate on the line
@alias module:modeling/maths/line2.xAtY