A photographer charges $75 for a photo session and $12 for each sheet of photos the Customer buys. Whích function can be used to find c, the total cost of a photo sessíon
if the customer buys p sheets of photos?
7
C= 75p- 12
c= 12p - 75
C= 12p + 75
C= 75p+ 12
A
C
D

C (c=12p + 75)

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: