Question

once the hot air balloon reaches its cruising altitude, it flies at an elevation of 2,400 feet. it stays at its cruising altitude, meaning it does not ascend or descend, for 30 minutes. how would you describe this line? the line of the graph is dropdown with options: going down, going up, flat

Explanation:

The graph shows elevation (y-axis) stays constant at 2,400 feet as time (x-axis) increases. A line with no change in the vertical value as the horizontal value increases is flat.

Answer:

flat