Using a plastic measuring graduate marked in half-ounce units, we will collect water from a drinking fountain. We will time it, so that the water is turned on for only ten
seconds, and the graduate will show us how much water we can collect in ten seconds. We want to do this five or six times, to see if we get the same amount of water each time.

If we write down the measurements of water we collect, we can make a graph that will show whether the volume of water is the same each time.

From the graph, we can use arithmetic to predict (guess) how long it would take to fill the graduate completely.

Also, we want to collect and measure the volume (in ten second intervals) of water we get from each of the school's drinking fountains, and make a graph of each fountain. Then we will know if they are all the same.

After the volume from each fountain is graphed, make predictions as to how long it would take each fountain to fill the graduate.