Answer:
-1
Explanation:
To find the slope of a line that is parallel to the given line, we need to know that parallel lines have the same slope. The given line is in the form of `y = mx + b, where m is the slope and b is the y-intercept. Therefore, the slope of the given line is -1. Since the slope of a line parallel to the given line is the same, the slope of the line we are looking for is also -1.