Answer: A. c = 1.35n + 15
Explanation:
Given: Charge for each job = $15
Additional cost per poster = $ 1.35
Total cost = Charge for each job + (Additional cost per poster) (Number of posters) ...(i)
Varaibles:
c= Tota; cost for n posters.
Substitute all values in (i), we get

Hence, the required equation : c = 1.35n + 15
Hence, the correct option is A. c = 1.35n + 15.