A graph shows the distance a train travels in miles versus time in hours. If the point $(4, 240)$ is on the graph, what does it represent?

The train travels 4 miles in 240 hours.

The train travels 240 miles in 4 hours.

The train's speed is 240 miles per hour.

The total trip is 244 miles long.

On a graph showing a proportional relationship between earnings and hours worked, what does the point $(1, 22)$ represent?

The total earnings after 22 hours.

The unit rate of 22 dollars per hour.

It takes 22 hours to earn 1 dollar.