The error is the symbol for the ray is not correct.
We know that opposite rays are two rays that both start from a common point and go in exactly opposite directions.
In the image attached the rays,
→
YC and
→
YE are opposite rays.
And the points E, Y, and C are colinear, that is the points E, Y, and C lie on a straight line.
In the image, the rays YC and YE just have a line on the above without the right arrow mark. This representation that is given in question indicates that YC and YE are line segments and not rays.
The correct way to represent them is
→
YC and
→
YE are opposite rays.
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