5 Consider the arithmetic sequence below.
-9, -2, 5, 12,...
Given that the sequence is represented by the function an), determine the value of f(1) and find the common difference.
O A R1) = -2
Common difference : 7
OB.
f(1) = -9
Common difference: 7
О с.
R1) = -2
Common difference: -7
OD
R1)=-9
Common difference: -7