Answer: Second option.
Step-by-step explanation:
By definition, a Coordinate plane has an horizontal axis, which is called the x-axis and it also has a vertical axis,which is called the y-axis.
Observe in the picture given in the exercise that the point of intersection between the x-axis and the y-axis is the point [tex](0,0)[/tex], which is known as "Origin".
Given a point (x, y), "x" is the x-coordinate of the point and "y" is the y-coordinate of the point.
Then, given the following point:
[tex](2,-4)[/tex]
You can identify that its x-coordinate is:
[tex]x=2[/tex]
And its "y" coordinate is:
[tex]y=-4[/tex]
You can observe in the picture that this coordinates corresponds to the point B.