Make y the subject of the formula w= x² – 2yz
Choose the correct answer.
W-x?
- W
Ay= 2z
B
c y= x-
2z
x? – W
Dy=
2z
E y = W + 22
2

D.

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: