The population of Phoenix grew from about 440 000 in 1960 to

The population of Phoenix grew from about 440, 000 in 1960 to about 1, 320, 000 in 2000 From 1960 to 2000 the population of Phoenix increased by From 1960 to 2000 the population of Phoenix increased by per year. From 1960 to 2000 the population of Phoenix Increased by percent. From 1960 to 2000 the population of Phoenix increased by percent per year.

Solution

A.

Population increased by:

= 1320000 - 440000 = 880000

B.

Population increase per year:

= 880000/40 = 22000 per year

C.

Population increased by percent:

= [1320000 - 440000]*100/440000 = 200%

D.

Population increase percent per yer

= 22000*100/440000 = 5% per year