Astrong cold front blew through during the night. the temperature outside began to drop rapidly. the graph below shows the temperature at each hour after the cold front blew through.

what is the rate of change in the graph?
a.
2.5°f per hour
b.
-2.5°f per hour
c.
-0.2°f per hour
d.
0.2°f per hour

B -2.5 per hour

Step-by-step explanation:

you can tell this will be negative because the temperature is dropping, by looking at the graph i see in two hours the temp. drops 5 degrees, if you divide this by 2 (to see the amount dropped per hour) you get 2.5 but remember this is negative therefore the rate of change is -2.5