Mrs. Konings is planning an ice cream social for her students. It is going to cost her $100 to rent the facility plus $3 per person for ice cream and toppings. Which function represents the total cost for Mrs. Konings if x students attend the ice cream social? 
f(x)=3x+100
f(x)=103x 
f(x)=100x+3 
f(x)=3x+100