Which blocks have a volume between 20 and 30 cubic centimeters? There are four rectangular prisms. Prism A has six rows of two, prism B has four rows of two and three total layers, prism C has five rows of three and three total layers, prism D has six rows of two and two total layers.

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:

1     sepan

2     encuentren

3     tenga

4     hable

5   parezca

6   llegue