Answer:
y = -x - 4
Explanation:
y = mx + b is slope intercept form,
where m is the slope, and b is the y-intercept.
As we can see from the picture, the line has a negative slope of 1 (we can also just say -1). We know this is the slope because it has a rise of -1 and a run of -1. (I hope that made sense lol :/)
[Side note, we use x instead of 1.]
The y-intercept is -4 since we can see the line passes through the y-axis at -4.
Therefore, the equation can be written as y = -x - 4