Verified Answer :

SImple,

this line is in the form of y=mx+b..which means that m=slope and b=y-intercept..

Thus, the slope for this line is.... \(-\frac{1}{3}\)

Thus, your answer, A.

y=mx+b
m=slope
y=-1/3x-3

m=-1/3
slope=-1/3

answer is A