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?
A. The water temperature is expected to be 0.5 °F less than the air temperature.
O B. The water temperature is expected to be 0.5 °F greater than the air temperature.
C. When the air temperature increases by 1 °F, the water temperature is expected to decrease by 0.5 °F.
O
D. When the air temperature increases by 1 °F, the water temperature is expected to increase by 0.5 °F.
