Linear temp change

The temperature in Inuvik, Northwest Territories, increased at the same rate from -22°C at 9:00 AM to -8°C at 4:00 PM one day. What was the temperature at 2:00 PM?

Correct answer:

t2 =  -12 °C

Step-by-step explanation:

t9=22 °C t4=8 °C Δ1=t4t9=(8)(22)=14 °C Δ2=16.009.00=7 h  c=Δ1/Δ2=14/7=2 °C/h  t2=t9+c (14.009.00)=(22)+2 (14.009.00)=12°C

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