The Bath Tub
Billy Bob has an ancient bathtub that drains slower than the dickens. He filled up his
tub and then let the water drain out to see how long it would take to drain. The graph
below represents the number of gallons of water remaining in the tub and the time in
minutes.
(15,0) (0.20)
X1 YI X2 yz
Zo -0 = 20
0-15
-15
Gallons of Waler
16
14
8
U
12 minune
Use the graph to answer the questions below.
1) How many gallons of water are in Billy Bob's tub after 6 minutes?
2) What is the slope of the line?
3) What do the numbers in the slope represent in the context of the problem?