Felicia bought a jackhammer priced at $8.48. The total price, including sales tax, was $9.73. What was the sales tax percentage? Round your answer to the nearest tenth.

14.7%

Step-by-step explanation:

GIVEN: Felicia bought a jackhammer priced at . The total price, including sales tax, was .

TO FIND: What was the sales tax percentage.

SOLUTION:

Price of jackhammer

Total price including sales tax

Total sales tax on jackhammer

Total sales tax percentage

Hence the total sales tax percentage  on jackhammer is 14.7%

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: