Visualization of the Cost Function

The three-dimensional graph below shows the values of the cost function $J(\theta_0, \theta_1)$ for different values of $\theta_0$ and $\theta_1$.

You can click and drag to rotate the graph, scroll to zoom in and out, and hover over the data points in the graph to see each value of $\theta_0$, $\theta_1$, and $J$.