The slope of the linear model, represented by the coefficient of \( x \) in the equation \( y = 1.5x + 0.125 \), indicates the change in \( y \) (total snow accumulated in inches) for each unit change in \( x \) (time in hours).
In this case, the slope is \( 1.5 \). This means that for every additional hour (1 unit increase in \( x \)), the total snow accumulation increases by 1.5 inches (the value of the slope).
Therefore, the BEST interpretation of the slope is:
The snow is accumulating at 1.5 inches every hour.