Please answer the four answers below :) if you cant see click on the picture(s) and zoom in

For question 5 the correct formula is C=πd

For question 6 the correct formula is C=2πr

For question 7 the answer is 56.52 I think I'm not 100% sure though

For question 8 the answer is 31.4

Step-by-step explanation:

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: