Could be y=8x + 16?
The gradient is 8 bcause each time x increases by one y increases by 8
Answer:

Step-by-step explanation:
Area = pi*r^2
Area = pi*9^2
Area = 
Answer: n= -20?
Step-by-step:
Simplify both sides of the equation
1/5n+4=0
Then subtract 4 from both sides
1/5n + 4 - 4 = 0 - 4
1/5n= -4
Then multiply both sides by 5
5*(1/5n)=5*(-4)
Answer:
-3
Step-by-step explanation: Because it is just like saying 6-3