Elliot collected the air temperature and the water temperature at a local river for seven days. His data is displayed on the scatter plot. 80
70
.
Water Temperature (°F)
.
60
50
60
70
80
Air Temperature (°F)
The equation of the line of best fit is y = 0.5x + 25, where x is the air temperature and y is the water temperature.
What is the meaning of the slope of the line of best fit?
O A. The water temperature is expected to be 0.5 °F less than the air temperature.
B. The water temperature is expected to be 0.5 °F greater than the air temperature.
O c. When the air temperature increases by 1 °Fthe water temperature is expected to decrease by 0.5 °F.
OD. When the air temperature increases by 1 °F, the water temperature is expected to increase by 0.5 °F.

An annual marathon covers a route that has a distance of approximately 26 miles. winning times for this marathon are all over 2 hours. the following data are the minutes over 2 hours for the winning male runners over two periods of 20 years each. earlier period 14 12 15 22 13 10 19 13 9 14 20 18 16 20 23 12 18 17 6 13 recent period 7 11 7 14 8 9 11 14 8 7 9 8 7 9 9 9 9 8 10 8 (a) make a stem-and-leaf display for the minutes over 2 hours of the winning times for the earlier period. use two lines per stem. (use the tens digit as the stem and the ones digit as the leaf. enter none in any unused answer blanks. for more details, view how to split a stem.) minutes beyond 2 hours earlier period 0 1 2 (b) make a stem-and-leaf display for the minutes over 2 hours of the winning times for the recent period. use two lines per stem. (use the tens digit as the stem and the ones digit as the leaf. enter none in any unused answer blanks.) minutes beyond 2 hours recent period (c) compare the two distributions. how many times under 15 minutes are in each distribution