Answer:
A.
Step-by-step explanation:
Where d is the difference
[tex]a_{n}[/tex] = [tex]a_{1}[/tex] + (n - 1) d
[tex]a_{n}[/tex] = [tex]a_{1}[/tex] + (n - 1) 7
(Because 8 - 1 is 7)
