2. Representations of Functions
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Make a function table to obtain ordered pairs.
To graph the function y= 32x+1, 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 | 3/2x+1 | y | (x,y) |
---|---|---|---|
- 4 | 3/2( - 4)+1 | - 5 | ( - 4, -5) |
- 2 | 3/2( - 2)+1 | - 2 | ( - 2, - 2) |
0 | 3/2( 0)+1 | 1 | ( 0, 1) |
2 | 3/2( 2)+1 | 4 | ( 2, 4) |
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= 32x+1.