To predict the number of inches of snowfall after 10 hours using the equation of the trend line \( y = 1.7x + 0.1 \), substitute \( x = 10 \) into the equation.
\[ y = 1.7(10) + 0.1 \] \[ y = 17 + 0.1 \] \[ y = 17.1 \]
After rounding to the nearest tenth, the predicted number of inches of snowfall after 10 hours is 17.1 inches.