Try this option:
1. if line (its equation is y1=k1*x+b1) y1||y, it means that k1=k. k1=1/2.
2. using the coordinates of point (-2;1) and substituting them into equation y1=k1*x+b1 (where k1=1/2):
1=1/2 *(-2)+b1; ⇒ b1=2.
3. if k1=1/2 and b1=2, then parallel line is:
y1=1/2x+2.
answer: y₁=0.5x+2
