Question

On a winter day, the temperature changes by -3 1/2 degrees Fahrenheit in 1 3/4 hours. What is the average change in temperature each hour?

Answer 1

-3 1/2 -----> 1 3/4 hours

x -----------> 1 hour

`\begin{gathered} x*1(3)/(4)=-3(1)/(2)*1 \\ (7)/(4)x=-(7)/(2) \\ (4)/(7)*(7)/(4)x=-(7)/(2)*(4)/(7) \\ x=(-7*4)/(2*7) \\ x=(-28)/(14) \\ x=-2 \end{gathered}`

answer:

- 2 is the average chang in temperatura each hour