At 9:00 A. M. It was - 8º F. At 3:00 P. M. the temperature was 10º F.

Which expression shows how to find the average increase per hour in temperature?

[10 - (-8) ]:6

[10 + (-8) ]:6

6: (-8+10)

6:[-8 - (-10) ]

Increase per hour=increase/hours

increase=temp (final) - temp (initial)

hours=9am to 3pm

given

temp (initial) = - 8

temp (final) = 10

increase=10 - (-8)

increase=10+8

increase=18

how many hours elapsed

9 to 12 is 3 hours

12 to 3 is 3

3+3=6

6 hours elapsed

increase per hour=18/6=3f/h

oh, you want the equation

[10 - (-8) ]/6 is the equation

the first one