Answer:
the value of d = -6
Thus, the second point is:
Explanation:
Given 
Here:
Using the formula
Slope = m = [y₂ - y₁] / [x₂ - x₁]
substitute (x₁, y₁) = (2, 3)
, (x₂, y₂) = (2, -5) and m = 0
 0 = [-6 - d] / [3 - 7]
 0 = [-6-d] / [-4]
 0×(-4) = -6-d
 0 = -6-d
 d = -6
Therefore, the value of d = -6
Thus, the second point is: