What is the name of the ray that is opposite bd ?

Observe the figure below.

We have to identify the ray that is opposite to BD.

Ray is defined as a line with a start point but no end point (it could go to infinity). It may happen that a ray starts from a point and might come across another point but has no end point. If a line ends at two distinct points we call it a line segment.

Now, in the given image we can see that there is a ray passes through the point B and D called BD. Now a ray whose direction is opposite to that of the ray BD can be given as BA.

Since the point of start is B, so the ray in the opposite direction has to start from the point B and only ray BA seems in accordance with the given image.

(4,5

look up a corrdinate plane and do what the thingy says and boom