Which expression represents the relationship between the step number, n, and the total number of small squares in the pattern?
ccss.hsa-sse.a.1.q.a1.bqf.3
ccss.hsf-bf.a.1.a.q.a1.bqf.3
ccss.hsf-if.a.2.q.a1.bqf.3
hsa-sse.a.1
hsf-bf.a.1.a
hsf-if.a.2
relationship between step number and number of squares
building quadratic functions from geometric patterns

Anonymous
0
A. n^{2} +1.
B. n^{2} - 1
C. n^{2} - n
D. n^{2} + n