Answer:
Here:
Explanation:
x is how much she spends, y is how much she saves.
for c, you can write:
y = 300, x = 0
y = 200, x = 100
y = 100, x = 200
y = 50, x = 250
y = 1, x = 299
x and y are variables because they can vary depending on one or the other.
The formula is just a relation between x and y. For example, another way can be that I give you $10 and you buy me 5 bottles of water. But if I give you $20, you will buy 10. The amount I give you and the number of bottles you buy me are both dependent and they have a relationship no matter what value they are. And the relationship is described by the function in the question.