Answer:
The slope of graph is 
Option C is correct option.
Step-by-step explanation:
We need to find the slope (rate of change) of the graph
The formula to calculate slope is: 
Taking two points from the graph: (You can take any two points from the graph)
Point 1 (-4,-3)
Point 2 (-2,0)
We have: 
Putting values in the formula and finding slope

So, the slope of graph is 
Option C is correct option.
Step-by-step explanation:
t^2-4xt-12/t-8
= -(t^2-4-6)/4
= -t^2+4+6/4
=<u> -t^2+6</u>