What is the percent increase when 7,200 increases by 1,800? A. 20 percent

B. 25 percent

C. 54 percent

D. 80 percent

B.

Step-by-step explanation:

The percent increase when 7200 increases by 1800 is 25 %

4.0 ft

step-by-step explanation:

4.0 ft

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: