Lesson 4A More Statistical Displays 533= Step-by-Step Solutions begin on page R1.
Extra Practice begins on page EP2.- Use a graph.
- Solve a simpler problem.
- Look for a pattern.
- Choose an operation.
Use a graph to solve Exercises 2–4.- CALORIES The table shows the average
number of Calories burned while sleeping
for various hours.
(^) Calories Burned
While Sleeping
Hours Calories
6 386
7 450
8 514
9 579
a. Make a graph of the data.
b. If the trend continues, about how many
Calories are burned by sleeping for
10 hours?
- ADVERTISING A local newspaper charges
$14.50 for every three lines of a classified ad.
Predict the cost of a 7-line ad. - SWIMMING The table shows the winning
Olympic times for the Women’s 4 x 100-
meter Freestyle Relay in swimming from
1972 to 2008. Make a graph of the data.
Predict the winning time in 2012.
Women’s 4 × 100-meter
Freestyle Olympic Times
Year Time (s)
1972 235
1976 225
1980 223
1984 224
1988 221
1992 220
1996 219
2000 217
2004 215
2008 213
Use any strategy to solve Exercises 5–9.(^55) WOODWORKING Two workers can make
two chairs in two days. How many chairs
can 8 workers working at the same rate
make in 20 days?
- POSTAGE The table shows the postage
stamp rate from 1975 to 2008. Make a
graph of the data. Predict the year the
postage rate will reach $0.50.
(^) Postage Stamp Rates
Year Cost ($)
1975 0.13
1978 0.15
1981 0.20
1985 0.22
1988 0.25
1991 0.29
1995 0.32
1999 0.33
2001 0.34
2002 0.37
2006 0.39
2007 0.41
2008 0.42
- ANATOMY Each human hand has 27 bones.
There are 6 more bones in the fingers than
in the wrist. There are 3 fewer bones in the
palm than in the wrist. How many bones
are in each part of the hand? - ALLOWANCE Tia used half of her allowance
to buy a ticket for the class play. Then she
spent $1.75 on an ice cream cone. Now
she has $2.25 left. How much is her
allowance? - E WRITE MATH Explain the importance
of constructing an accurate graph when
predicting future trends.
532_533_C09_PSI_895130.indd 533 1/11/10 9:42 AM