Make x the subject of the formula y = ax + b

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.

Which graph represents the equation y =4x

1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show