10 [25-{8-6 (16-13)}÷5

70

Step-by-step explanation:

to solve : start wit the inside brackets first

10 [25-{8-6 (16-13)}÷5   start 16-3

10[25-{8-6(3)}÷5           then multiply 6 and 3

10[25-{8-18}]÷5              then subtract 8-18

10[25-(-10)]÷5                

10[25+10)÷5                  add numbers inside brackets

10×35÷5=70                 multiply and divide

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: