Functions and Interpreting Graphs

The graph of the function for the amount of water in gallons, D, in a tank at time, t, is shown. What statement is true?

• The water is draining out because the line is decreasing.

• The water is draining out because the line is increasing.

• The water is filling up because the line is decreasing.

• The water is filling up because the line is increasing.

• Noah because $80 is more than $60.

• Elena because $80 is more than $60.

• Noah because $4 is more than $2

• Elena because $4 is more than $2

Noah is depositing money in his account every week to save money (shown in the graph). The amount of money in Elena's account is M=4w+80 , where w is the number of weeks since the account was opened and M is the amount of money saved. Who saved at a faster rate?

• Noah because $80 is more than $60.

• Elena because $80 is more than $60.

• Noah because $5 is more than $4

• Elena because $5 is more than $4

Elena filled up the tub and gave her dog a bath. Then she let the water out of the tub.

At what rate did the water drain from the tub?

• 4 gallons per minutes

• 2 gallons per minutes

• 3 gallons per minutes

• 5 gallons per minutes

When did her phone start losing charge?

• 2 PM

• 10 PM

• 4 PM

• 8 PM

When did her phone get back to a full charge?

• 2 PM

• 10 PM

• 4 PM

• 8 PM

This graph shows Andre biking his bike.

What section(s) show that Andre stopped and rested?

• A and B

• B and C

• B and D

• A and C

This graph shows Andre biking his bike.

What section(s) shows that Andre rode down a hill away from his house?

• E

• B and E

• B and D

• A and C

Elena filled up the tub and gave her dog a bath. Then she let the water out of the tub.

How much water was in the tub when she bathed her dog?

• 24 gallons

• 0 gallons

• 18 gallons

• 30 gallons

Does this graph have a maximum or minimum value?

• maximum

• minimum

• neither

• both