The rate of change is the slope. You're finding the average between two points, so find the slope between them using the slope formula. It's 20.
Step-by-step explanation:

m is the slope.
plug in the numbers, and you get

Ok so tell me the weird sign in front of the 6 and I should be able to help you.
Answer: 6
Step-by-step explanation:
x^2+y^2+x-y
Put x=-1 and y=1
(-1)^2+(3)^2+(-1)-(3)
1+9-1-3
10-4
6
I=P*R*T
I=1000*.05*5
She will pay $250.
Answer:
D
Step-by-step explanation:
I don’t believe there is any work to show for this question