Answer:
The equation of a line passing through the origin has the form y=kx.
We know one pair (x, y) on this line: (3, 1). Substituting x=3, y=1 in y=kx, we have:
1=3k, which yields k=1/3.
Thus, the equation of the line is y=(1/3)x.
Answer: D
Step-by-step explanation:
