Circumference is a linear distance. So if the diameter is in feet, then the circumference is also in feet (not square feet or cubic feet)
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Example: 
Let's say we had a circle with diameter d = 10 feet
The circumference is approximately...
C = pi*d
C = 3.14*10
C = 31.4
The circumference is roughly 31.4 feet
The circumference is essentially the distance around the circle's edge. We can use a flexible ruler or a string to help measure out this distance, or you can imagine laying the circle's edge to be placed along a straight line, which is another way to help measure the perimeter.
 
        
             
        
        
        
Answer:
y = |1/4x|
Step-by-step explanation:
The slope is 1/4
 
        
             
        
        
        
Answer:
D.
Step-by-step explanation:
Your graph of f(x)=  is the parent function. What you need to know for this graph what the stretch or compression is and what the flip is. When you flip somehting over the x-axis, which is g(x), your
 is the parent function. What you need to know for this graph what the stretch or compression is and what the flip is. When you flip somehting over the x-axis, which is g(x), your  is negative. Also, since your graph gets skinnier, the number before the x would be a whole number, with no fractions. The only answer that fulfills this is answer choice D.
 is negative. Also, since your graph gets skinnier, the number before the x would be a whole number, with no fractions. The only answer that fulfills this is answer choice D.
 
        
             
        
        
        
Answer:
See below.
Step-by-step explanation:
It is the one at the top left side.
The line y = x passes through the origin at an angle of 45 degrees to the x axis and rises to the right.
So if you imagine its a mirror you'll see that its a reflection in that mirror.