Select "equivalent" or "not equivalent" for each pair of expressions. Expressions
equivalent or not equivalent?
5x - 7+ 3x and 3x - 7+ 5x equivalent not equivalent
4y+9+ 3y and 3y+9+ 4y equivalent not equivalent
6z - 2z + 4 and 4 + 22 - 6z equivalent not equivalent

1 and 2 are equivalent and 3 is not equivalent because rhe numbers are are just swapped you have to pay attention to the signs.

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: