Decide whether the data in the table represent a linear function or an exponential function. explain how you know.
x y
1 162
2 54
3 18
4 6
5 2
a. the data represent an exponential function because there is a common ratio of 3.
b. the data represent a linear function because there is a common difference of 108.
c. the data represent a linear function because there is a common difference of –108.
d. the data represent an exponential function because there is a common ratio of 1/3.