The diagram below represents the first three terms of a sequence. assuming the pattern continues, which formula determines an, the number of squares in the nth term ?

The correct answer is B)

Writing the sequence numerically, we have 4, 7, 10, ...

This is an arithmetic sequence, since there is a constant, 3, added each time.  This gives us the explicit formula


Using the distributive property, we have


Combining like terms, we have

All about the same size in the city the game was