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Its -4 because the line intercepts -4 on the y-axis.

Step-by-step explanation:

Part A

She has 3 regions before she begins all this mathematical hocus pocus. Each region has 8 members. So 3 * 8 = 24.

The answer is the third one down "the number of clients she has before expansion."

Part B

8 + 3x represents the increase in clients as the months go by. She starts with 8 clients per region and every month she wants to increase her total by 3.  What best says that? Though not completely accurate, the first one is your best answer, but it is not a good one. The wording should be as I've stated it.

Part C

I really don't know what would fit. 8 + 3x is a number representing clients in any give month in any region (not all of them).  I guess I would pick per month. The wording is a little awkward. If you have an answer, go with it.