The diameter of a circle measures 14mm. What is the circumference of the circle? Use for 3.14, and do not round your answer. Be sure to include the correct unit in your answer.

the direct variation says that:

then the equation is of the form is given by:

            where k is the constant variation.

from the given table:

consider any value of x and m(x)=y

x = 2 and m(x)=y = 3

substitute these value in [1]; we have;

divide both sides by 2 we get;

⇒

check:

put x = -1 and m(x) = -1.5

substitute in the equation:

-1.5 = -1.5                   true

therefore, the function m(x) represents a direct variation

graph of this function as shown below:

you didn't give me the choices, so i will just give you the graph so you can look at your choices and choose the right one.