Population Growth Population growth is becoming a big problem in our country and the world today. The reason it has become such a pressing issue is that our growing population needs a growing economy and has growing needs. As our population grows, the needs of the population become greater. A very large population becomes a problem when there is not enough room to live and not enough food and supplies to live on. We can predict future population size by examining the recent past. This may give us good ideas about what we will need to do to accommodate all people in the United States and around the world, or start imposing restrictions on the birth of children, like our compatriot China. In this activity we were given the populations of the United States and the world from 1950 to 1990. We used the calculator to obtain two different equations, one linear regression and one exponential regression. These models were compared to see which fit the data best. In the first part, the linear regression model fits the US data better. The equation was y= 2423350x + 154659200, r...