At a national park in Wyoming, there was already 84 inches of snow on the ground. Then, snow fell during a snowstorm at a rate of 1.5 inches per hour for 12 hours. A park ranger created a linear model to relate the number of inches of snow on the ground, y, and the number of hours since the snowstorm began, x.

Which answer choice correctly interprets the slope and y-intercept of this linear model?
A
The slope is 102 inches, and the y-intercept is 18 total inches.

B
The slope is 102 inches, and the y-intercept is 1.5 inches per hour.

C
The slope is 18 total inches, and the y-intercept is 84 inches.

D
The slope is 1.5 inches per hour, and the y-intercept is 84 inches.