Maria wants to buy a car that costs $2,000 She starts with 5600 in her savings account and adds to the account every week. The graph below shows how much she has saved in the first 4 weeks. Assuming she continues to save at the same average rate, about how many more weeks will it take for Maria’s savings to reach $2,000?

A.   The data in the table represent a function. y=x/2. This is seen as for every value of x in the table, y=x/2(half of it). You can show this further by trying this fact on each value.

B.   For the original function, when x =8, y=x/2=4
For the function given in this part, when x=8, y=3(8)-10
                                                                 y=24-10                                                                                                            y=14
     This means the relation given in this part has a greater value when x=8

C. When x=80, f(x)=3(80)-10
                           =240-10
                           =230