-3 1/2 -----> 1 3/4 hours
x -----------> 1 hour
[tex]\begin{gathered} x\times1\frac{3}{4}=-3\frac{1}{2}\times1 \\ \frac{7}{4}x=-\frac{7}{2} \\ \frac{4}{7}\times\frac{7}{4}x=-\frac{7}{2}\times\frac{4}{7} \\ x=\frac{-7\times4}{2\times7} \\ x=\frac{-28}{14} \\ x=-2 \end{gathered}[/tex]answer:
- 2 is the average chang in temperatura each hour
