Hi there!
To find the percent of change we can use the following formula:

Let's fill in our data

Subtract

Divide

And finally multiply

Hence, the percent of change is negative 20%.
~ Hope this helps you!
(-4,0) (3,-5) I don't know if they mean two ordered pairs so I'm pretty sure this is right
X=5/9
Y=0.65
See below the following picture for the solution
Answer................:8x^2-2x-1