The correct answer is the third option. I just got it correct.
Hi there!
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I believe your answer is:

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Here’s why:
- The formula for the slope of two given lines given is 'rise over run'.
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- We are given the points (3,5) and (8,7).
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Hope this helps you. I apologize if it’s incorrect.
Answer:
5
Step-by-step explanation:
The slope will be the constant amount that the cost increases by each month.
In this situation, 5 is the slope, because he has to pay $5 each month.
35 is not the slope, and is instead the y intercept. This is because this is the cost at 0 months, since it is the membership fee.
So, the correct answer is 5.