A more thorough explanation:

Definition: Nomography is the art of creating graphical representations of mathematical relationships. It involves using a chart or graph to solve complex equations or calculations.

For example, a nomogram can be used to determine the correct dosage of medication based on a patient's weight and age. The nomogram would have lines representing different weights and ages, and where those lines intersect would indicate the appropriate dosage.

Another example of nomography is a slide rule, which was commonly used before the advent of electronic calculators. A slide rule is a type of nomogram that uses sliding scales to perform mathematical calculations.

Nomography is a useful tool for engineers, scientists, and mathematicians who need to perform complex calculations quickly and accurately. It allows them to visualize mathematical relationships and solve problems without having to rely on tedious calculations or computer programs.