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Relations & Functions 101
Function Notation

What is functional Notation?

When we use Functional Notation we write f(x)= instead of y.
 
 
Eg) instead of:
y=3x+2
Let x=3
y= 3(3)+2
y=9+2
y=11
 
when we write:
 
f(x)= 3x+2
let x=3
f(3)=3(3)+2
f(3)=9+2
f(3)=11
 
We use this because we are given "x" and it is cleaner for mathematicians to use.
 
BELOW IS 3X + 2

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*More Examples
 
**
f(x) = 3x+8
x=3
f(3) = 3(3)+8
f(3) = 9+8
f(3) = 17
 
**
f(x) = 6x-2
x = 6
f(6) = 6(6)-2
f(6) = 36-2
f(6) = 34

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