Question 427986
Intuitively, it would make sense that you can replace all the x's in your statement with some other expression (as long as the end result is defined), for example, -2. As in,


f(-2) = 5(-2) + 2 = -8, or


f(-1/2) = 5(-1/2) + 2 = -1/2. You can try the other two.