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Presentation transcript:

Splash Screen

Five-Minute Check (over Lesson 9–8) Main Idea and Vocabulary Concept Summary: Types of Relationships Example 1: Identify a Relationship Example 2: Identify a Relationship Example 3: Line of Fit Example 4: Line of Fit Example 5: Line of Fit Lesson Menu

Construct and interpret scatter plots. line of fit Main Idea/Vocabulary

CS

Identify a Relationship Explain whether a scatter plot of the data for the number of cups of hot chocolate sold at a concession stand and the outside temperature might show a positive, negative, or no relationship. As the temperature decreases, the number of cups of hot chocolate sold increases. Therefore, the scatter plot might show a negative relationship. Answer: negative Example 1

Determine whether a scatter plot of the data for the number of cups of lemonade sold at a concession stand and the outside temperature might show a positive, negative, or no relationship. A. positive B. negative C. no relationship A B C Example 1

Identify a Relationship Explain whether a scatter plot of the data for the birthday and number of sports played might show a positive, negative, or no relationship. The number of sports played does not depend on your birthday. Answer: Therefore, the scatter plot shows no relationship. Example 2

Determine whether a scatter plot of the data for your age and the color of your hair might show a positive, negative, or no relationship. A. positive B. negative C. no relationship A B C Example 2

Line of Fit ZOOS The table to the right shows the average and maximum longevity of various animals in captivity. Make a scatter plot using the data. Then draw a line that seems to best represent the data. Example 3

Graph each of the data points. Line of Fit Graph each of the data points. Draw a line that best fits the data. Answer: Example 3

PRODUCTION The table to the right shows the average hourly earnings of production workers since 2000. Make a scatter plot using the data. Then draw a line that seems to best represent the data. Example 3

A. B. C. D. A B C D Example 3

Line of Fit ZOOS The graph shows the average and maximum longevity of various animals in captivity. Write an equation for the line of fit. The line passes through the points at (15, 40) and (35, 70). Use these points to find the slope of the line. Example 4

Line of Fit Example 4

Use the slope and the y-intercept to write the equation. Line of Fit Use the slope and the y-intercept to write the equation. Answer: Example 4

PRODUCTION The graph shows the average hourly earnings of production workers since 2000. Write an equation for the line of fit using the points (0, 11.43) and (5, 13.76). A. y = 1.4x + 12.15 B. y = 0.924x + 3.07 C. y = 0.815x + 9.21 D. y = 0.466x + 11.43 A B C D Example 4

Line of Fit ZOOS The graph shows the average and maximum longevity of various animals in captivity. Use the equation to predict the maximum longevity for an animal with an average longevity of 33 years. Example 5

Answer: The maximum longevity is about 67 years. Line of Fit Answer: The maximum longevity is about 67 years. Example 5

PRODUCTION The table to the right shows the average hourly earnings of production workers since 2000. Use the equation y = 0.466x + 11.43 to predict the average hourly earnings of U.S. production workers in 2009. A. $14.81 B. $15.62 C. $15.92 D. $16.07 A B C D Example 5

End of the Lesson End of the Lesson

Five-Minute Check (over Lesson 9–8) Image Bank Math Tools Slope and Intercept Resources

How many students are in the eighth grade? (over Lesson 9-8) How many students are in the eighth grade? A B C D A. 89 B. 130 C. 219 D. 245 Five Minute Check 1

What percentage of students does not play sports? (over Lesson 9-8) What percentage of students does not play sports? A B C D A. 68.5% B. 40.6% C. 33.2% D. 19.6% Five Minute Check 2

What is the ratio of soccer players to football players? (over Lesson 9-8) What is the ratio of soccer players to football players? A B C D A. 11:17 B. 22:219 C. 22:31 D. 11:22 Five Minute Check 3

(over Lesson 9-8) The graph shows the number of points scored for the first seven weeks of football season. What is the average number of points scored during the first seven weeks? Round your answer to the nearest tenth. A B C D A. 145 points B. 24.2 points C. 20.7 points D. 10.7 points Five Minute Check 4

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