A slope is a constant rate of change for a linear function. Usually you can find the slope by the following formula: Slope= (Delta y/Delta x). To put a slope in a table you should have 2 colums x and y. The rows of the table represent data from the graph at point x and y. It will look like this:
Graph y
6 /
4 /
2 /
0 1 2 3 4 5 x
Table
x y
Row 1 1 2
Row 2 2 4
Row 3 3 6
Row etc..
The table can be short or long depending on the information given and the instructions.
To calculate the slope use the formula, which will give you: (6-2)/(3-1)= 4/2= 2
This is a very general explanation, if you have an excercise it would be easier to explain it in more detail :).
