Question

If f(x) = 0.6(3 – x), what is the value of f(–3)?



A.
0


B.
1.8


C.
3.6


D.
4.8

Answer 1

substitute by x=3 in the equation
.6(3-x)

Answer 2

\(\bf f({\color{brown}{ x}}) = 0.6(3 -{\color{brown}{ x}} )\qquad\qquad
f({\color{brown}{ -3}}) = 0.6(3 -{\color{brown}{ \square ?}} )\)

Answer 3

I still don't understand. So would the answer be c?

Answer 4

well.. change the "x" for -3 and see what you get

Answer 5

what does the f stand for? That's what I'm missing

Answer 6

http://www.brightstorm.com/math/algebra/graphs-and-functions/function-notation/ <-- function notation