What is the difference between rational functions and inverse variation

In math, any function which can be defined by a rational fraction, i.e. an algebraic fraction such that both the numerator and the denominator are polynomials is called a rational function.

On the other hand, a relationship between two variables in which the product is a constant is called an inverse variation.

To add, a rational function is the ratio of two POLYNOMIALS and the domain and range of rational functions do not usually contain all the real numbers and they often have what are called asymptotes, Meanwhile, the inverse variation means you are given some function, and you need to find the function that exchanges inputs and outputs.

$25

step-by-step explanation:

25 - 4.50 = 20.5

20.5 / 2 = 10.25

10.25 + 10 = 20.25

20.25 - 12.50 = 7.75

therefore the answer is $25 as shown as the first number.