Please help there is a lot of points and I will mark brain

Y=x-90

Step-by-step explanation:

bc the y int is -90 and it's a constant slope

I am doing this in math atm..do not blow up at me if I get this wrong!

y= -70x + 10

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation: