2. Representations of Functions
Sign In
Make a function table to obtain ordered pairs.
To graph the function y= x4, we will follow two steps.
To make a function table, we will select some values of x which will be part of our domain. Then, we will substitute these values for x to find the corresponding values of y. These x- and y-values will create a set of ordered pairs.
x | x/4 | y | (x,y) |
---|---|---|---|
- 4 | - 4/4 | - 1 | ( - 4, - 1) |
- 2 | -2/4 | - 0.5 | ( - 2, - 0.5) |
0 | 0/4 | 0 | ( 0, 0) |
2 | 2/4 | 0.5 | ( 2, 0.5) |
4 | 4/4 | 1 | ( 4, 1) |
We found four ordered pairs that lie on the graph of our function.
Next, we will graph the ordered pairs and connect them with a straight line.
The line is the complete graph of the function. The ordered pairs corresponding to any points on the line are solutions of the equation y= x4.