Emery borrowed money from her brother to buy a new phone and is paying off a fixed amount each week. After 2 weeks, she will owe $456, and after 5 weeks, she will owe $228. a. Write an equation in point-slope form to represent the situation.

b. What was the original amount Emery owed?
608$
c. How much is being paid each week?
76$

I know the first two answers but I need to know the first one, Please Help