Every dot is one prediction: where the model thought the load would be (up) versus where it actually landed (across). The dashed gold line is a perfect call — the tighter the cloud hugs it, the better the model.
Pick any metric on the right and I'll explain what it measures. Then grab the sliders below and break the model on purpose — add scatter, push a bias, drop in outliers — and watch which numbers react and which don't. That's how you learn what each one is really telling you.
