38. The lines graphed below show the amounts of water in two tanks as they were being filled over time. TANK FILLING RATES
Water (gallons)
1,800
1,600
1,400
1,200
1,000
800
600
400
Tank A
Amount
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.