Rational Expressions

Rational expressions are algebraic fractions in which both the numerator and the denominator are polynomials. These expressions follow the arithmetic rules of numerical fractions but require extra care due to the presence of variables. A fundamental part of working with rational expressions is identifying values that make the expression undefine...

In a growing city, expanding limits and new housing developments increase the population, leading to crowding. Population density quantifies how crowded the city becomes.

It can be modeled as a rational expression in terms of time, t, a fraction where the numerator is the total population and the denominator is the total area.