Please help me solve this question about transformation of graphs

Answer this question! 30 points and brainliest!

What term best describes a line ans a point that lie in the same plane

Arestaurant charges $100 to rent its banquet room for an event. it also charges $15 to serve dinner to each guest. write an equation for the total cost of the banquet room in terms of the number of guests. deine your variables. what is the total cost of the banquet room for 20 guests?