The length of XS is 9.
We can get this because of the definition of a bisector. A bisector is something that cuts something else into two equal parts. So, if the something is 18 units long, then half of it would be 9 units. That's exactly what's happening in this problem, so that means that XS, like in our example problem, will be 9.
{0,-3,-9,5,7}
....,,
...............
When x = 1, y = 1 + 4 = 5
When x = 3, y = 3 + 4 = 7
When x = 5, y = 5 + 4 = 9
When x = 7, y = 7 + 4 = 11
Therefore, the correct answer is option D.
Answer:
80 I'm pretty sure, if you get it wrong and can change it, try 100
