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.

Item 1 which question could the expression 1000n answer? let n = the number of gallons of gas used. how many miles per gallon did the car get driving 1000 miles? let n = the number of grams of food needed for each dog. how many grams of food are needed to feed 1000 dogs? let n = the number of people at the show. how many empty seats were there at the show if there are 1000 seats at the theater? let n = the number of seats at the theater. how many empty seats will there by if 1000 people come to the show?