The correct answer to this question is Y = -2x - 4. The slope of an equation refers to the proportion of rise/run, or the distance the line travels on the vertical axis (or y-axis), which is the rise, compared to the distance the line travels on the horizontal axis (or x-axis), which is the run.

The intercept is the point at which the line intersects with the horizontal access (or x-axis), which in this case is -2. Because the line travels downwards as it moves to the right, we know the slope is negative, and therefore the answer is Y = -2x - 4.