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Mathematics 15 Online
OpenStudy (anonymous):

A movie rental store charges a membership fee of $10.00 plus $1.50 per movie rented. What is a possible domain that shows the cost to a member of renting movies? The domain is all integers. The domain is all even integers. The domain is all integers 0 or greater. The domain is all integers 10 or greater.

OpenStudy (anonymous):

I think its D, but I'm not 100% sure

OpenStudy (anonymous):

@jim_thompson5910 One more?

jimthompson5910 (jim_thompson5910):

The domain refers to the set of allowed inputs (usually x) of a function

jimthompson5910 (jim_thompson5910):

So what is x? Is it the cost? Or the number of movies you rent?

OpenStudy (anonymous):

x is equal to the movies rented.

jimthompson5910 (jim_thompson5910):

number of movies rented, yes

jimthompson5910 (jim_thompson5910):

so is it possible to rent say x = 4 movies?

OpenStudy (anonymous):

Yes.

jimthompson5910 (jim_thompson5910):

how about x = -22 movies

OpenStudy (anonymous):

No.

jimthompson5910 (jim_thompson5910):

so you can go below 10, but you cannot go below 0

OpenStudy (anonymous):

Okay. My thought was because you're a member, the main cost ($10.00) would be the starting point.SO, 10 +

jimthompson5910 (jim_thompson5910):

that's the cost you pay regardless of how many movies you rent so even if you don't rent anything at all (x = 0), then you still pay $10 This is the lowest cost you pay, so therefore, the smallest value in the range (not the domain)

jimthompson5910 (jim_thompson5910):

so that's why it helps to identify what the domain is referring to

OpenStudy (anonymous):

OH! Okay. thank you once again!

jimthompson5910 (jim_thompson5910):

sure thing

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