I need the answer explained

An equation where variables are used to represent known values—function notation true or false

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9

During the election for class president, 40% of the students voted for kellen, and 60% of the students voted for robbie. 500 students voted in total. how many more students voted for robbie than for kellen? answer with work : )