Problem:

 

Three of your friends are discussing their solution to a problem from last night’s homework.

 

The problem asked you to find an equation that would represent the following pattern: 

 

        

 

Term

1

2

3

4

5

Sequence Number

4

12

20

28

36

 

Sammy thought the equation would be: n = 8t – 4 if t = term and n = sequence number.

 

Jenny found the equation to be: n = 8t + 4 if t = term and n = sequence number

 

Juan believed the equation should be:  Next = Now + 8 with the first Now being 4. 

 

Which student(s) is/are correct?  Justify your answer.