
Jeanne B. answered 09/13/19
Over 20 years experience tutoring Algebra 1, making it easy and fun.
Functions may sound confusing at first but if you just remember that you substitute for the x with the given value (in this case it is given that x=2, and then solve for x..
so, f(2) = 2 (2) -6 I substituted 2 for all the x's