Final answer:
The correct linear equation to represent the slope-intercept form with a slope of 3 and a y-intercept of 9 is y = 3x + 9. However, this equation is not listed among the provided options, indicating an error in the options given for the relationship between the hours of the snowstorm and the inches of snow on the ground.
Step-by-step explanation:
To find which equation models the relationship between the number of hours, x, of the snowstorm and the number of inches of snow, y, on the ground, we need to understand the slope-intercept form of a line, which is y = mx + b. Here, m represents the slope and b represents the y-intercept. Based on the given Figure A1, which shows the y-intercept is 9 and the slope is a rise of 3 for every unit increase in x, we can directly rule out the options A, B, and D as they do not have a y-intercept of 9. None of the given options correctly reflect the slope and y-intercept described in Figure A1. Therefore, there seems to be an issue with the provided options, as none match the description provided. If we were to apply the correct slope and y-intercept to the equation, it would be represented as y = 3x + 9, which is not listed among the options.