In the equation for the cost of a gym membership, \( C = 25 + 5x \):
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The y-intercept is 25. This means that if a person does not visit the gym at all (\( x = 0 \)), they still have to pay a base fee of $25 for the membership.
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The slope is 5. This means that for each additional visit to the gym (\( x \) increases by 1), the cost increases by $5. In other words, every time the individual goes to the gym, they incur an additional cost of $5.