### Home > CC4 > Chapter 2 > Lesson 2.2.4 > Problem 2-86

2-86.

Does the table below appear to represent a function? If so, write an equation using function notation. If not, explain why it cannot represent a function. 2-86 HW eTool (Desmos) Homework Help ✎.

| 0 | 1 | 2 | 3 | 4 |

| 4 | 8 | 12 | 16 | 20 |

Input the points into the table in the eTool below to determine if it represents a function.

Click the link at the right to view full version of the eTool: Int1 2-86 HW eTool.

There can only be one *y*-value for each *x*-value in a function.

Plot the points on a graph and draw a slope triangle or use another method to find the slope.

The *y*-intercept is given in the chart when *x* = 0.

*f*(*x*) = 4*x* + 4