Please help 100 points

I could be wrong but if she spends $1 each day for chips. She would have 25¢ extra. And she buys 5 bags per week then she would have $1.25 per week. Add that into a graph to get a final answer.

Graph:
X| Y
1 | .25
2| .50
3| .75
4| 1.00
5| 1.25

21/2 or 5/2