If a grain of salt is 0.4 mm wide, how many grains of yeast could fit across one grain
of salt?

Step 1. multiply (0.6 x 10 1) (1 x 10 -3) = 6 x 10 -4

Step 2. divide 6 x 10 -4 and 4 x 10 -6\

Step 3. answer- 1.5 x 10 2

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:

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step-by-step explanation: