Answer:
-2
Step-by-step explanation:
The slope of the function can also be described as its gradient.
To find the gradient of the function you can use:
[tex] \frac{change \: in \: y}{change \: in \: x} [/tex]
This gives us
[tex] \frac{ (- 10) - 10}{8 - ( - 2)} [/tex]
Which equals -2
