Answer:
I think it shifts horizontally by 7 units to the right. Not completely sure though.
Step-by-step explanation:
If they are looking to have them all simplified, this is how they should look.
4y - 4
4y + 4
4y + 1
General Idea:


Conclusion:
Amount of interest that Lucy to be charged in a typical month is <u>$9.75</u>
The slope is (y2 - y1) / (x2 - X1) and you will use this formula A TON in math!!!
So,
(4 - 2) / (5 - 1) = 2/4 = 1/2