Which expressionis equivalent to -2-7

2-7

-2-(-7)

-2+(-7)

2+7

-2 - 7 = -2 + (-7)

Step-by-step explanation:

-2 - 7

= -9

2 - 7

= -5

-2 - (-7)

= -2 + 7

= 5

-2 + (-7)

= -9

2 + 7

= 9

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: