The number of squares grows with each step in the pattern as shown in the table

Question

Step Number of Squares

1 4

2 7

3 12

4 19

n ?

How many squares will be in step N?

A. n(n + 3)

B. n^2 + 3

C. n + 3

D. 3^n + 3

Answer 1

n=1, 4 squares

n=2, 7 squares

n=3, 12 squares

n=4, 19 squares

n=5, 28 squares

n=6, 39 squares

n=7, 52 squares

b) n^2 + 3

n=4, 4^2+3 = 16+3 = 19

n=3, 3^2+3 = 9+3 = 12