The value of y is proportional to x. When x=3, then y = 15. Which equation represents the relationship between x and y? A y = 0.2x

B y = 5x

C y = 12x

D y = 45x HEL PL

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.