Function world2canvas

polynomial-regression/index.js:23–25

(canvas, x, y)

const order = 3;
// Convert world coordinates to canvas ones.
function world2canvas(canvas, x, y) {
  return [x + canvas.width / 2, -y + canvas.height / 2];
}
// Draw x and y axes in the canvas.
function drawAxes(canvas) {
  const ctx = canvas.getContext('2d');