From $x=1$ to $x=2$, the temperature decreased by about $10°$F.

From $x=2$ to $x=3$, the temperature increased by less than $5°$F.

From $x=4$ to $x=5$, the temperature increased by about $3°$F.

From $x=6$ to $x=7$, the temperature decreased by about $3°$F.