The lines graphed below show the amounts of water in two tanks as they were being filled over time.
TANK FILLING RATES
1,800
1,600
1,400
1.200
Amount of Water (gallons)
1.000
Tank A
800
600
400
Tank B
200
0
0.5
1
1.5
2
Time (minutes)
For each tank, explain whether or not there is a proportional relationship between the
amount of water. in gallons, and the time, in minutes. If there is a proportional
relationship, identify the unit rate. Use specific features of the graph to support your
answer