### Home > A2C > Chapter 4 > Lesson 4.2.1 > Problem 4-73

4-73.

The gross national product (GNP) was

What was the GNP in 1989?

Multiply the GNP in 1960 by

The GNP in 1989 is

Write an equation to represent the GNP

*t*years after 1960, assuming that the rate of growth remained constant.

Remember that the GNP increases by

Do you think the rate of growth really remains constant? Explain.

If you don’t know or you aren’t sure, try looking it up on the internet. Look for a graph. You could enter GNP USA into a search engine.