Real world problem

You are hosting a party at a restaurant. The restaurant charges $150 to reserve the room plus $25 person for food and drink.
Write a linear equation representing your total bill based on the numbe of people at your party.
If you graph this line, what is its slope?
What does the slope represent in this scenario?

I think the equation is: x= 25x-150
slope is 6

y=150+25x