Answer:
an = 7n -10
Step-by-step explanation:
In general, the iterative rule for an arithmetic sequence with first term a1 and common difference d is ...
... an = a1 + (n-1)d
Your sequence has a1 = -3, and d = 7, so the rule can be written ...
... an = -3 + 7(n -1)
and simplified to ...
... an = 7n -10
