Answer:
B.

Explanation:
A proportional relationship in 'x' and 'y' is given as:

Where, 'k' is called as the constant of proportionality.
So, the graph of a proportional relationship always crosses the origin.
This means that the 'x' and 'y' intercepts of a proportional relationship is always at the origin (0, 0).
From among all the options, the option that matches the definition of a proportional relationship is option B.

Here,
.
Therefore, the correct option is option B.