Answer: Phyllis starts with $50 and Chen starts with $15.
Explanation:
Given: Phyllis and Chen are saving money to go to a football game.
Phyllis made a graph to show the total she has saved at the end of each week.
From the given graph , we can see that the y intercept of the graph =(50,0)
i.e Phyllis has $50 when he started saving.
Also, Chen wrote an equation to show the total, y, he has saved at the end of each week, x.
![y = 15x + 15](https://img.qammunity.org/2020/formulas/mathematics/middle-school/pl6izjtf32epcegpv6divixyugg3dcjm74.png)
At x= 0, we get
![y=15](https://img.qammunity.org/2020/formulas/mathematics/middle-school/wm414v1sj567qs6kquv0svsijyc644zcyr.png)
Therefore, Chen has $15 when he started saving.