People who study population trends have developed a special type of bar graph to show how the population of an area is divided by age and gender. It is called a POPULATION PYRAMID. A population pyramid provides a visual layout about the population in a specific location. By analyzing the trends of past and present populations, this instrument can also be used to project future population. Take a look at the two pyramids below. .

Scroll over the parts of the pyramids numbered below to learn more