Final answer:
The value of b in the equation y = mx + b represents the y-intercept, the point where the line crosses the y-axis in a linear relationship. In this case, the value of b is 0.
Step-by-step explanation:
The equation y = mx + b represents a linear relationship, where y is the dependent variable (death depth in inches), x is the independent variable (time in days), m is the slope, and b is the y-intercept. In this case, the equation is y = mx + b, where m and x are not given, and we need to find the value of b. The value of b is the y-intercept, which is the point where the line crosses the y-axis. So, the correct answer is A. 0.