In city A, the temperature rises 9° from 8 am to 9 am. Then the temperature drops 8° from 9 am to 10 am. In city B, the temperature drops 5° from 8 am to 9 am. Then the temperature drops 4° from 9 am to 10 am.
a. What expression represents the change in city A?
b.What integer represents the change in temperature for city A?
c.What expression represents the change in city B?
d.What integer represents the change in temperature for city B?
e.Which city has the greater change in temperature from 8 am to 10 am?