Answer is B. y= -1/2x
Reason - there is no y intercept so the line will pass through (0, 0)
The others
❌ A. y= -1/2 is a horizontal line at -1/2 on the y axis
❌ C. y= x - 1/2 has y intercept that the line will pass through
❌ D. y= -1/2x + 2 has y intercept that the line will pass through