Work is provided in the image attached.
Start with the slope formula.
Plug the coordinates in for the appropriate places.
Then simplify.
Any questions?
Feel free to ask.
Answer:
Step-by-step explanation:
It's the <em>magnitude</em> of the average rate of change that's important here.
| -12.5 | is greater than | 10 |. The negative sign tells us that the function is decreasing on the given interval.
Answer:
(x + 1)(x + 8)
Step-by-step explanation:
x(x + 8) + 1(x + 8)
x2 + 8x + 1x + 8
x2 + 9x + 8