I don't really know how this works, this is my first time using this website. I am taking a practice test right now, so I don't want the exact answer to this question, just help getting it step by step or maybe a similar equation worked out as an example.

The number of cars (c) in a parking lot increases when the parking fee (f) decreases. Write the correct equation for the scenario and solve for the number of cars when the fee is $6.

Fee | Cars
----------
20 | 15
30 | 10

Question

I don't really know how this works, this is my first time using this website. I am taking a practice test right now, so I don't want the exact answer to this question, just help getting it step by step or maybe a similar equation worked out as an example. 

The number of cars (c) in a parking lot increases when the parking fee (f) decreases. Write the correct equation for the scenario and solve for the number of cars when the fee is $6.

Fee  |  Cars
----------
20   |  15
30   | 10

inkyvoyd · Answer

HINT: the two numbers are inversely proportional. notice how they always multiply up to 300. Got an idea?

anonymous · Answer

So would it look like c = 300/f; c = 50?

inkyvoyd · Answer

I would say so.

anonymous · Answer

Awesome, thank you so much!

inkyvoyd · Answer

No problem. btw, closing the question allows you to ask another if you need more help. you can tag people by using the "@" symbol followed by their name.

anonymous · Answer

Alright, good to know! Thank you

inkyvoyd · Answer

No problem - welcome to the site, and I hope you have a good time!