Name _______________________________________ Date __________________ Class __________________
Lesson 5-2
Practice B: Interpreting Graphs
1. The gas tank in Karen’s car was full. Karen drove the car until
1
only
of the tank was full. Karen filled up the tank again and
4
1
drove the car until
of the tank was full. Which graph best
4
shows the story? Circle the letter of your answer.
A
B
C
2. An elevator started at the ground floor. It went up to the sixth
floor and stopped, then went to the fourth floor and stopped,
and finally returned to the ground floor. Which graph best shows
the story? Circle the letter of your answer.
F
G
H
3. Maxine biked 6 miles from her house
to the park. She played some softball.
Then she biked 4 miles farther to the
movie theater. After watching a movie,
Maxine returned home. Complete the
graph so that it shows the distance
Maxine is from home compared to the
time.
4. Use your graph to find the total
number of miles Maxine biked.
_______________________________________
Holt McDougal Mathematics
Name _______________________________________ Date __________________ Class __________________
Graphs
Challenge: Step Functions
A step graph is a graph that looks like steps. You can use step
graphs to represent certain kinds of relationships. The step graph
below shows the total cost of calls of different lengths on a particular
pay phone system.
The symbol
shows
that the segment includes
the right endpoint, but not
the left endpoint.
Use the graph above to answer the questions.
1. What is the cost of making a 4-minute phone call? ___________________________
2. What is the cost of making a 5.5-minute phone call? ___________________________
3. Describe how the length of the call is used to
determine the total cost.
________________________________________________________________________________________
________________________________________________________________________________________
4. Find the charge for any phone call with a length (l)
that has the following values: 6 minutes < l ≤ 7 minutes.
_____________________________
5. How does this phone system calculate charges for
fractions of minutes?
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
Holt McDougal Mathematics