There Is a Strong Straight-Line Relationship Between the Outdoor Temperature

Multiple Choice

There is a strong straight-line relationship between the outdoor temperature and the amount of energy used to air condition a house. Higher temperatures require more energy to keep the house cool. Knowing this, a reasonable value for the correlation coefficient between temperature and home energy consumption is:

A) r = 1.
B) r = 0.8.
C) r = 0.
D) r = -0.8.
E) r = -1.