For this weeks math post, I am going to explain how to understand and use function notation.
Function notation, uses a formula that looks somewhat like this
f(x)=…
Our first number is what our function is, and our x, is our input
Our first letter (f) basically just tells us what function it is, and it helps us differ each function notation from one another. The x’s job is to basically just be our input, and in most formulas, x is a number but we where using the “skeleton” form of this equation.
Our next example is going to be this
f(5)=3x+6
how we would solve this, is by inputting our x (5) into our equation so it will look something like this.
f(5)=3(5)+6
after this is done, all we have to do is multiply, and add our variables together. So our answer will be:
f(5)= 21
Other questions may give you something that looks like this
It may give you the layout (ex)
f(x)=3(x)+6
and then it will give you
f(x)=21
your job is now to find what x is.
how one may do this is by subtracting 6, then dividing by 3, which will give us the correct answer of f(x)=5.
I chose to do my blog post on this topic because I feel as though I understood it fairly well and that I could demonstrate it in a learning fashion as well.