Pls help i cant fugure it out and question is on picture

Step-by-step explanation:

According to the figure, cos Ф = 16/20 = 4/5 = 0.80.

Using the inverse cosine function on a calculator, we get

Ф = 0.644 radians or 36.87 degrees or arccos 4/5

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: