State an Explicit Rule for the Nth Term of the Recursively-Defined

Multiple Choice

State an explicit rule for the nth term of the recursively-defined sequence.
- $\mathrm { a } _ { \mathrm { n } } = \mathrm { a } _ { \mathrm { n } - 1 } + 8 ; \mathrm { a } _ { 1 } = 1$

A) $a _ { n } = 8 + 1 ( n - 1 )$
B) $a _ { n } = 8 + 1 ( n )$
C) $a _ { n } = 1 + 8 ( n )$
D) $a _ { n } = 1 + 8 ( n - 1 )$