Assuming the customer gives you a $10 bill for a meal costing $5.38, how much change should you give him?

We should get $4.62 in change

Step-by-step explanation:

We need to subtract the cost of the meal from the 10 dollar bill

10.00

-5.38

We need to borrow

9. 10 0

-5. 3 8

We need to borrow

9.  9 10

-5. 3 8

4 . 6 2

We should get $4.62 in change

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: