3) Which sequence is modeled by the graph below?

coordinate plane showing the points (1, 2); (2, 2); (3, 2); (4, 2)

A) an = 2(n − 1)1

B) an = 2(1)n − 1

C) an = 2 + (1)n − 1

D) an = (2)(n − 1)


4) Find the sum of the summation of 2 i minus 9, from i equals 3 to 10.

A) 52

B) 26

C) 13

D) 32