Which statement is always true?

a. a linear relationship is proportional.

b. a linear relationship is non-proportional.

c. a proportional relationship contains the point (0, 0).

d. a non-proportional relationship has a constant rate of change.

***will give brainleist answer***

Which statement about perfect cubes is true

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.

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?