Answer:
a. The equation is y = 44x
b. The slope is 44, which means savings for a particular week x is 44 times the said week.
Step-by-step explanation:
To write an equation that represents the given graph, we need to find the slope. Let us select two points (2, 88), (4, 176)
The slope is:

The equation is:

This is with y-intercept being 0.
The slope of the graph is 44, it means the savings for a particular week x is 44 times the said week.