Answer:
Part A: Draw a model for the ratio of panels to the money that she will save.
Let the number of panels = y
And the money that she will save = x
For every 2 panels, she will save $60.
2x = 60y
x = 30y
See the attached figure which represents the model.
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Part B: Write the ratio of panels to Money saved
Panels to money =
= 1 : 30