Which table represents a linear function?

As the tables are not attached, the attachment is given below:

Only table 3 represents the linear function.

Step-by-step explanation:

The linear equation with slope 'm' and intercept 'c' is given as:

The slope of a line with points is given as:

Table 1:

The slope is calculated as below:

The slope of other two points can be obtained as follows,

The slopes are not equal. Therefore, table 1 is not correct.

Table 2:

The slope is calculated as below:

The slope of other two points can be obtained as follows,

The slopes are not equal. Therefore, table 2 is not correct.

Table 3:

The slope is calculated as below:

The slope of other two points can be obtained as follows,

The slopes are equal. Therefore, table 3 is correct.

Table 4:

The slope is calculated as below:

The slope of other two points can be obtained as follows,

The slopes are not equal. Therefore, table 4 is not correct.

Therefore, only table 3 represents the linear function.