Interpret the slope of the relation.

The slope of the relation $F = \frac{9}{5}C + 32$ is $\frac{9}{5}$.

The slope represents the change in Fahrenheit temperature ($F$) for every one-unit change in Celsius temperature ($C$).
A slope of $\frac{9}{5}$ means that for every $1^{\circ}\text{C}$ increase in temperature, the temperature in Fahrenheit increases by $\frac{9}{5}^{\circ}\text{F}$ (or $1.8^{\circ}\text{F}$).

Interpretation:
The slope of the relation indicates that for every one-degree Celsius increase in temperature, the corresponding Fahrenheit temperature increases by $\boxed{\frac{9}{5} \text{ degrees Fahrenheit}}$.