Unit 1: Collection, Display, And Interpretation Of Data Worksheet - 6th Grade Page 25
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44Date
Time
LESSON
The Cost of Mailing a Letter
1 8
Math Message
141
The graph below is called a step graph. It shows the cost of sending a letter weighing
1 ounce or less by first-class mail anywhere in the United States.
Cost of Mailing a First-Class Letter Anywhere in the U.S., 1905–2005
40¢
35¢
30¢
25¢
20¢
15¢
10¢
5¢
0¢
1905
1915
1925
1935
1945
1955
1965
1975
1985
1995
2005
Year
The cost of mailing a letter was 3 cents from 1932 until
.
1.
Did the cost of mailing a letter ever go down? If so, when?
2.
How many rate increases were there between 1960 and 1970?
3.
In which year did the greatest increase occur?
4.
By how much did the cost of mailing a letter increase between 1960 and 1970?
5.
Can you tell from the graph the cost of mailing a letter before 1900?
6.
In which year do you think the cost of mailing a letter will reach 50 cents? Explain.
7.
25
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