Question

I WILL FAN AND MEDAL
the world's total population is projected to grow throughout the first quarter century of the new millenium

year: 1990 1995 2000 2010 2020 2025
recorded : 5249 5679 6127 7028 7924 8177
and
projected
population(millions)

write a model that relates the population as a function of the number of years since 1980?

Answer 1

Go to it! You will have to examine the data and see what sort of model might be appropriate.

My first impression of the data did not encourage me toward any sort of model. You'll have to make that call.