Answer:
The slope of the function is 5.
Explanation:
Remember that to calculate the slope of any function you just need the equation of the function on slope form: y=mx+c or any two points in the graph that are result of the function, in this case we have a table, and we will use the first two points:
(-4,-16)
(-2.-6)
So the formula for slope is:

We insert the values of our two points:

So the slope of the function is 5.