In 1997 there were 14 large apartment buildings in Calston, TX. By 2010 there were 53 large apartment buildings. What is the rate of change in the number of apartments buildings from 1997 to 2010?
A.
1/39 years per building
B.
53/13 buildings per year
C.
3 buildings per year
D.
14 buildings per month

Question

In 1997 there were 14 large apartment buildings in Calston, TX. By 2010 there were 53 large apartment buildings. What is the rate of change in the number of apartments buildings from 1997 to 2010?
A.
1/39 years per building
B.
53/13 buildings per year
C.
3 buildings per year
D.
14 buildings per month

anonymous · Answer

2010-1997=13 years
53-14 = 39
39/13 = 3

3 buildings per year

agent0smith · Answer

^yep 

Rate of change = change in y divided by change in x

note that time will ~always be the x.

anonymous · Answer

thank you to both of you:)