Final answer:
The horizontal component of the vector is 8.
Step-by-step explanation:
The horizontal component of a vector can be found by subtracting the x-coordinate of the starting point from the x-coordinate of the ending point.
In this case, the starting point is (-2, 10) and the ending point is (6, -1).
So, the horizontal component of the vector is 6 - (-2) = 8.