5. Which relation is a function?

A. {(–2, –12), (–2, 0), (–2, 4), (–2, 11)}

B. {(–4, –6), (–3, –2), (1, –2), (1, 0)}

C. {(8, 1), (4, 1), (0,1), (–15, 1)}

D. {(0,1), (0, 2), (1, 2), (1, 3)}

Jackson earns $25 per hour as a tutor at the college library. he set a weekly spending budget of $130 each week and puts the remaining money in his savings account. how many hours must he work this week to have at least an extra $50 to put in his savings account