Which graph represents a proportional relationship?

How do i do this activity, is appreciated

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents

Frank owns a $141,000 home, for which he has a 30-year mortgage in the amount of $700 a month. once he has paid off mortgage, how much will he have paid in investment? a. $111,000 b. $109,000 c. $120,000 d. $141,000