Which of the following best describes how the y values are changing over each interval? х
y
1
2
2
4.
3
8
4
16
32
5
They are increasing by 2 each time.
They are increasing by 4 each time.
OThey are being multiplied by 2 each time.
They are being multiplied by 4 each time.

Students are getting signatures for a petition to increase sports activities at the community center. the number of signatures they get each day is 3 times as many as the day before. the expression 3^6 represents the number of signatures they got on the sixth day. how many signatures did they get on the first day?