Answers:
1. 1
2. 2
3. 4
4. 1
//Hope this helps. Look the image for better understanding.
subtract 4x from both sides and you get y=4x
y varies directly with x. When x is 1, y is 1/4. when x is 4, y is 1. when x is 8, y is 2. So on and so on. Sorry if this is confusing. Direct variations is one of my weak points
The answer is C
I did this test yesterday
103+53=156
156/2=78
The average or mean is 78