Common Core Cumulative Standards Review
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Analyze the table of values. Then, write the information as a function of x.
D
We are given a table of values and we want to find a function that describes the data. To find one we will analyze the values.
| x | - 2 | - 1 | 0 | 1 |
|---|---|---|---|---|
| f(x) | - 3 | - 1 | 1 | 3 |
As we can see, f(x) is always the double of x plus 1. Let's see it in a table!
| x | Function | f(x) |
|---|---|---|
| - 2 | ( 2)(-2) + 1 | - 3 |
| - 1 | ( 2)(-1) + 1 | - 1 |
| 0 | ( 2)(0) + 1 | 1 |
| 1 | ( 2)(1) + 1 | 3 |
Now we will write this information as a function. f(x)= 2x + 1 Therefore, the correct option is D.