Practice - McGraw-Hill Higher Education

4-6NAME______________________________________________ DATE______________ PERIOD _____PracticeStatistics: Scatter Plots and Lines of FitDetermine whether each graph shows a positive correlation, a negativecorrelation, orno correlation. If there is a positive or negative correlation,describe its meaning in the situation.1. 2.Temperature versus RainfallAverageTemperature (F)64605652010 15 20 25 30 35 40 45Average Annual Rainfall (inches)Highest Point(thousands of feet)State Elevations1612840 1000 2000 3000Mean Elevation (feet)Lesson 4-6Source: National Oceanic and Atmospheric AdministrationSource: U.S. Geological SurveyCopyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.DISEASE For Exercises 3–5, use the table thatshows the number of cases of mumps in theUnited States for the years 1995 to 2003.3. Draw a scatter plot and determine whatrelationship, if any, exists in the data.4. Draw a line of fit for the scatter plot.5. Write the slope-intercept form of an equation for theline of fit.ZOOS For Exercises 6–9, use the table thatshows the average and maximum longevityof various animals in captivity.6. Draw a scatter plot and determine whatrelationship, if any, exists in the data.7. Draw a line of fit for the scatter plot.U.S. Mumps CasesYear 1995 1997 1999 2001 2003Cases 906 683 387 116 56Source: Centers for Disease Control and PreventionU.S. Mumps Cases1000800Cases60040020001995 1997 1999 2001 2003YearLongevity (years)Avg. 12 25 15 8 35 40 41 20Max. 47 50 40 20 70 77 61 54Source: Walker’s Mammals of the World8. Write the slope-intercept form of an equation for theline of fit.9. Predict the maximum longevity for an animal withan average longevity of 33 years.Chapter 4 45 Glencoe Algebra 1