What is the recursive rule for the sequence?

−7.4, −21.2, −35, −48.8, −62.6, ...

A.) an=an+1+13.8 , where a1=−7.4

B.) an=an−1+13.8 , where a1=−7.4

C.) an=an−1−13.8 , where a1=−7.4

D.) an=an+1−13.8 , where a1=−7.4

The common difference is -21.2 - (-7.4) = -13.8

So

a_{n} = a_{n-1} - 13.8, where a_{1} = - 7.4