Which type of function is shown in the table below?

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

7+(3n++8) what is the answer to this?