Question

For the function f(x)=2-3x, find f(4)
A. -10
B. -5
C. 12
D. 14

Help please? :)

Answer 1

f(4)=2-3*4=2-12=-10

Answer 2

A is your answer

Answer 3

Alright, so functions are essentially tools where you put something in, the function has a set of rules that modifies what you put in, and returns something new.

So in this, the set of rules says (We subtract, from 2, 3 times what you put in)

So you put in 4 (insert it in the x slot)

f(4) = 2 - 3(4)
f(4) = 2 - 12
f(4) = -10

-10 is what you get out, and is your answer. So pick A.