It depends on how you interpret "toward the water".

The x-axis represents time in seconds.

The graph shows the stone rising from 0 to 0.5 seconds and then falling the rest of the time.

If "toward the water" means from the time it left her hand, then the answer is 0 to 1.5 seconds.

If "toward the water" means the stone's downward path, after rising at first, then the answer is 0.5 to 1.5 seconds.

- Algebra House

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