
- How many trains can you make a length of one?
- How many trains can you make a length of two?
- How many trains can you make a length of three?
- How many trains can you make a length of five?
- How many trains can you make a length of six?
- How many trains can you make a length of zero?

Look at the table of values and find a pattern in the number of different trains possible column.
Is there a relationship between the length of train and the number of different trains possible?
Represent the relationship as an equasion by using variable "L" as the length of the the train and the variable "N" as the number of trains possible.
How quick can you work it out?..