Which graph shows a proportional relationship?

David must install fencing around a lot that is shaped like a right angle. the side of lot that runs east-west is 200 ft long. the side of the lot runs north-south is 125 ft long. calculate how many feet of fencing he will need to surround the entire lot.

If 20% of a number is 35, what is 50% of that number?

What is the solution of the equation? 35√(x+2)3+3=27