Answer:
Diagonal
Step-by-step explanation:
Graph y = -x. The coefficient of the x term, or the "m" in y = mx + b format, represents the slope, so the slope of the line must be -1. There is also no number adding to or subtracting it, or the "b," which represents the y-value of the y-intercept - thus the y-intercept is just (0,0).
Thus, plot the y-intercept, (0,0), and graph the rest of the line with the given slope, -1. (A graph is attached below.) This gives us a diagonal line.
