Which of the following relations describes a function? A. { (-4, 4), (-3, 3), (3, 3), (4, 4) } B. { (-3, 0), (0, 3), (3, 0), (0, -3) } C. { (0, 0), (3, -3), (3, 3), (4, 4) } D. { (-4, 4), (-3, -3), (-3, 3), (0, 0) }

Harry owes the bank money. to repay his debt, he paid $150 back to the bank each month. after 10 months, his remaining debt was $6900. what was the original amount of harry's debt? how long did it take harry to pay back his entire debt?