Answer:
answer is below
Explanation:
y^2 = 16x is of the form y^2 = 4ax (ie. focal length is a = 4).
The latus rectum is a focal chord at right angles to the axix of the parabola.
In this example the the eauation of the latus rectum is x = 4
Solving y^2 = 16x with x = 4 gives y = -8, 8
Therefore the end points of the latus rectum for y^2 = 16x are (4, -8) and (4,8)