Final answer:
The linear equation and inequality have no relationship.
Step-by-step explanation:
The relationship between the linear equation and the given inequality can be determined by analyzing their slopes and y-intercepts.
The linear equation 2x - 3y = 6 is in standard form, where the slope can be found by rearranging the equation to y = mx + b form.
In this case, the slope is 2/3, which indicates a positive slope. On the other hand, an inequality has an inequality symbol (<, >, ≤, ≥) and does not represent a specific line, but rather a region of solutions.
Therefore, the correct relationship between the linear equation and inequality is that they have no relationship (option D).