This is part of Ch 8 - Linear Functions.

1. Chapter 8 – Functions and Graphing 1.7 – Scatter Plots

4. If the points appear to suggest a line that slants upward to the right, there is a positive relationship . If the points appear to suggest a line that slants downward to the right, there is a negative relationship . If the points seem to be random, then there is no relationship .

5. The table shows the average cost of a loaf a bread from 1920-2000. Make a scatter plot of the data. 99 2000 72 1990 52 1980 24 1970 20 1960 14 1950 8 1940 9 1930 12 1920 Cents Year

6. Determine whether the scatter plot of the data for the following might show a positive, negative, or no relationship. Explain your answer. 62 64 66 68 70 72 74 76 78 80 2 4 6 8 10 12 14 16 18 20

7. The table shows temperature in degrees Celsius and the corresponding temperatures in Fahrenheit. A. Make a scatter plot of the data. C. Predict the Fahrenheit temperature for 35 °C. B. Does the scatter plot show a relationship between °C and °F? Explain. 86 77 68 59 50 41 32 ° F 30 25 20 15 10 5 0 ° C