Answer:
y = -x - 1
Explanation:
The line heads downward as x increases, meaning that y decreases. For each unit increase in x, y decreases by 1, so the slope of this line is
m = rise/run = -1/1, or just -1. The y-intercept is readily identified: it is (0, -1).
Thus, the equation of this line is y = -x - 1