Answer:
aₙ = 12.5 - 1.5(n - 1)
Step-by-step explanation:
We use the general equation
aₙ = a₁ + d(n - 1)
aₙ is the term we want
a₁ is the first term (12.5)
d is the common difference (-1.5) as we go through the sequence we see a common difference of -1.5
n is the term number (if we wanted the third term n would be 3)
