Use the graph representing bacteria decay to estimate the domain of the function and solve for the average rate of change across the domain. A.0 ≤ y ≤ 80, −0.6875
B.0 ≤ y ≤ 80, −1.45
C.0 ≤ x ≤ 55, −1.45
D. 0 ≤ x ≤ 55, −0.6875

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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:

4x and 6y

im not sure though