Functions

From Math Wiki

A Function is defined as: A rule of matching elements of two sets of numbers in which an input value from the first set has only one output value in the second set.

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Here are some rules of functions:

• Every input must have an output
• A single input cannot have more than one output
• Two different inputs can have the same output

On a graph:

• A vertical line will never be a function.

Okay well this is rondo idk what i'm doing but i'm gunna add a little contribution here after you get your range and domain here's the equation formula you follow and you plug in your numbers

y= m(x - x1) + y1

         x1 and y1 are a point from you graph m is slope

Recognize Quadradics for life

If you would like to see what a function looks like graphed, click here

Once you find the equation, you put the whole thing together. All you need is your domain and your equation. To put it all together, start with naming a function just as you would in function notation. Then make a { and state your final equation, using slope, and your x and y coordinance. after that follow with the word IF and state your domain.

Example: Say your equation is y= 1(x+4)-2

              and your domain is -2 > x > -4

Now your final product would look like this:

       k(x)= 1(x+4)-2 if -2 > x > -4