We start filling the pool with water. When filling began, the water in the pool had already reached a certain height. The water level increases linearly with time. The figure shows the graph of the function f, which shows the change in the height h of the water in the pool depending on the time t. Answer the questions below. Water height is measured in meters and time in minutes.
What was the height of the water in the pool when it started filling?
What was the height of the water in the pool one hour after it started filling?
How much did the water level in the pool increase every 15 minutes?
Write down the function f.
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