The equation y = 4x + 5 describes the relationship in the previous slide between x, the number of years after the tree was planted, with y, the height of the tree. From looking at the equation, y = 4x + 5, how tall was the tree the year it was planted?

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:

step-by-step explanation:

i think its about 8

(-infinity,infinity)