Solution:
The y-intercept of a line:
- Is a point that the line intersects at the y-axis.
Option A:
The y-intercept (intersecting point on the y-axis) of this line is -1/2.
Thus, Option A is correct.
Option B:
The y-intercept (intersecting point on the y-axis) of this line is 0.
Thus, Option B is incorrect.
Option C:
The y-intercept (intersecting point on the y-axis) of this line is 1.
Thus, Option C is incorrect.
In conclusion...
Option A is correct.