How do you do functions i dont understand how to get f(x) and then graph it

Alex F
A function relates an input to an output
If f(x) =  x + 1 then (x) = input  x + 1 = output Here x just signifies the input it can be any letter or number
f(x) =  x + 1 f(q) =  q + 1 f(A) =  A + 1
If our input x = 4 then we have
f(4) =  4 + 1 = 13
A function can also be expressed using y or f:x> f(x) =  x + 1 y =  x + 1 f:x>  x + 1 The 3 expressions above mean the exact same thing There are 3 types of basic graphs Linear  This graph is a straight line Exponential  This type of graph grows and shrinks very quickly Quadratic This graph is a parabola which means it makes a u or n shape

IrishJuniorCert
I think Alex is complicating this a bit much.
As far as I'm aware, you fully understand functions, just not how to graph them.
Well, it's pretty easy once you know that:
x = your input.
y = your output.
so say your x = 4. Then on the X Line, you are +4 across.
Input: 4
Function: x + 1
Output: 5
So the x value is 4 and the y value is 5. You can now graph your line. As Alex said, there will be much more complex types of functions where x will be squared and this will give you a parabola.

aoife0509
Thanks for your help i understand it a bit more nw

Ciara231001
im stuck on it too tbh

Me
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