ILL GIVE BRAINLIEST. It’s simple, I’m just dumb. If you could give me the answer thank you! (An explanation would be nice but you don’t have to.)

Jabari is power washing houses for a summer job. for every job, he charges an initial fee plus $30 for each hour of work. his total fee for a 4 -hour job, for instance, is $170 . jabari's total fee, f, for a single job is a function of the number, t, of hours it takes him to complete the job. write the function's formula.