Please help me I need to pass this class

Use the data on the dot plot to answer the question.how many people read for more than three hours last week? i'm on a unit test review

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.

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?