Question

The data in the table relates the total cost y to have a party with x guests at a restaurant.

Number Of Guests               Total Cost($)
                 X                                          Y
10                                   200
15                                       300
25                         500
30                                       600

Based on the information in the table, what is the function rule?

y = x + 190
x = y + 190
y = 20x
x = 20y