4melvin plans to attend a comic book
convention in march. the expenses, including
entry fee, hotel, food, and lodging, will be a
minimum of $550. melvin currently has $295
saved. he earns $8.50 per hour at his job
as a technician. how many hours will melvin
need to work in order to have enough money
to attend the convention?
x 30
(g x 30
ch x s 30
x 30

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: