What is true regarding the graphed function f(x)

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

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.

Combine like terms to make a simpler expression 3z+z