This question is based on the following table.

Household Income Average number of car per household

$0 --- $30,000 1.1

30,001 --- 50,000 1.8

50,001 --- 75,000 2.4

75,001 --- 100,000 2.8

100,001 --- 150,000 3.2

150,001 and over 3.6

The relationship between household income and average number of car per household is:

Group of answer choices

a. Fluctuating.

b. Indirect.

c. Terminal.

d. Nonexistent.

e. Direct.