Basic Mathematics for College Students

7. A horizontal or vertical line used for reference in a
   bar graph is called an.


8. In a circle graph, slice-of-pie–shaped figures called
   are used to show what part of the whole
   each quantity represents.

Fill in the blanks.

9. To read a table, we must find the of the
   row and column that contains the desired
   information.


10. The axis and the vertical axis of a bar
    graph serve to frame the graph, and they are scaled in
    units such as years, dollars, minutes, pounds, and
    percent.


11. A pictograph is like a bar graph, but the bars are
    made from or symbols.


12. Line graphs are often used to show how a quantity
    changes with. On such graphs, we can easily
    see when a quantity is increasing and when it is
    .


13. A histogram is a bar graph with three important
    features.

• The of a histogram touch.


• Data values never fall at the of a bar.


• The widths of the bars of a histogram are
  and represent a range of values.

14. A frequency polygon can be constructed from a
    histogram by joining the points at the top of
    each bar.


15. If the symbol =1,000 buses, estimate

what the symbol represents.

16. Fill in the blank: The symbol is used when graphing
    to show a in the scale on an axis.

Refer to the postal rate table on page 595 to answer the
following questions.See Example 1.

17. Find the cost of using priority mail to send a package
    weighing pounds to
    zone 3.


18. Find the cost of sending a package weighing
    pounds to zone 5 by priority mail.

(^2 14)
(^7 14)

GUIDED PRACTICE

NOTATION

CONCEPTS

20. Juan wants to send a package weighing 6 pounds
    1 ounce to a friend living in zone 2. Standard postage
    would be $3.25. How much could he save by sending
    the package standard postage instead of priority
    mail?

Refer to the bar graph below to answer the following questions.

See Example 2.

21. List the top three most commonly owned pets
    in the United States.


22. There are four types of pets that are owned
    in approximately equal numbers. What are
    they?


23. Together, are there more pet dogs and cats
    than pet fish?


24. How many more pet cats are there than pet
    dogs?

Refer to the bar graph on the next page to answer the following

questions.See Example 3.

25. For the years shown in the graph, has the production
    of zinc always exceeded the production of lead?


26. Estimate how many times greater the amount of zinc
    produced in 2000 was compared to the amount of
    lead produced that year?

Bird

Cat

Dog

Horse

Fish

Reptile

Small animal

25 50 75 100 125

(Millions)

Source: National Pet Owners Survey, AAPA

150 175

Total Number of Pets Owned

in the United States, 2009

7.1 Reading Graphs and Tables 603

19. A woman wants to send a
    birthday gift and an
    anniversary gift to her
    brother, who lives in zone 6,
    using priority mail. One
    package weighs 2 pounds
    9 ounces, and the other
    weighs 3 pounds 8 ounces.
    Suppose you are the
    woman’s mail carrier and she
    asks you how much money will be saved by sending
    both gifts as one package instead of two. Make the
    necessary calculations to answer her question. (Hint:
    16 ounces  1 pound.)

fromCampus to Careers

Postal Service Mail Carrier

Kim Steele/Photodisc/Getty Images