Transcript over Lesson 8-5 - Mr. Nelson`s Math

Five-Minute Check (over Lesson 8–5)
Main Idea and Vocabulary
Example 1: Use a Line Graph to Predict
Example 2: Use a Line Graph to Predict
Concept Summary: Types of Relationships
Example 3: Use a Scatter Plot to Predict
• Analyze line graphs and scatter plots to make
predictions and conclusions.
• Line Graph: Can be useful in predicting future
events when they show trends over time or
relationships.
• Scatter Plot: A scatter plot displays two sets of
data on the same graph and are also useful in
making predictions.
Use a Line Graph to Predict
TYPING The line graph shows
the time that it has taken Enrique
to type a class paper so far. The
paper is 600 words long. Use the
graph to predict the total time it
will take him to type the paper.
Continue the graph with a dotted line
in the same direction until you align
vertically with 600.
Graph a point. Find the value in minutes
that corresponds with the point.
Answer: It will take Enrique about 14 minutes
to type his 600-word paper.
TRAVEL During a recent road trip, Helen kept track
of the number of miles traveled after each hour of
travel time was completed. Use the line graph to
predict how far Helen will travel in 12 hours of travel
time.
A. 450 miles
B. 600 miles
C. 700 miles
D. 775 miles
1.
2.
3.
4.
A
B
C
D
Use a Line Graph to Predict
TESTS The line graph
shows the math test
scores of a middleschool student for five
chapters. If the trend
continues, what do you
think her score will be on
the next math test?
Answer: If the trend
continues,
Susan’s score on
the next test
should be about
86%.
CUSTOMERS The line
graph shows the number
of customers making
purchases at a clothing
store for six months. If
the trend continues, what
do you think will be the
number of customers
making purchases in the
next month?
A. about 150
B. about 225
C. about 260
D. about 300
1.
2.
3.
4.
A
B
C
D
Use a Scatter Plot to Predict
POLLUTION The scatter
plot shows the number
of days that a city failed
to meet air quality
standards from 2000 to
2008. Use it to predict
the number of days of
bad air quality in 2014.
Answer: By looking at the pattern in the graph, we can
predict that the number of days of bad air
quality in 2014 will be about 48 days.
GAS MILEAGE The scatter plot
shows the gas mileage based
on the weight of a car. Use it to
predict the gas mileage for a
car weighing 5,500 pounds.
A. 10 mpg
B. 14 mpg
C. 20 mpg
D. 23 mpg
1.
2.
3.
4.
A
B
C
D
End of the Lesson
Five-Minute Check (over Lesson 8–5)
Image Bank
Math Tools
Line Plots
(over Lesson 8-5)
Use the bar graph that shows festival attendance.
How many more people attended in 2006 than in 2003?
What year had the greatest increase in attendance?
What would you expect the 2007 attendance 1.to be?
A
2.
3.
4.
Find the median for the following set of data:
10.2, 14.5, 18.6, 7.2, 13.7, 15.1. Round numbers
to the nearest hundredth if necessary.
B
C
D
(over Lesson 8-5)
Use the bar graph that
shows festival attendance.
How many more people
attended in 2006 than in
2003?
A. 20,000
B. 25,000
C. 22,500
D. 17,500
1.
2.
3.
4.
A
B
C
D
(over Lesson 8-5)
Use the bar graph that
shows festival attendance.
What year had the greatest
increase in attendance?
A. 2003
B. 2004
C. 2005
D. 2006
1.
2.
3.
4.
A
B
C
D
(over Lesson 8-5)
Use the bar graph that
shows festival attendance.
What would you expect the
2007 attendance to be?
A. 70,000
B. 90,000
C. 100,000
D. 80,000
1.
2.
3.
4.
A
B
C
D
(over Lesson 8-5)
Find the median for the following set of data: 10.2,
14.5, 18.6, 7.2, 13.7, 15.1. Round numbers to the
nearest hundredth if necessary.
A. 14.5
B. 14.1
C. 13.7
D. 13.2
1.
2.
3.
4.
A
B
C
D