Here is my answer. In this problem, you need to use the similarity of triangles. I hope this is helpful.
The answer is d
Domain is just all x values
Answer:
x = 4
Step-by-step explanation:
An undefined slope means the line is vertical.
The equation for vertical lines is "x = a number"
Since the x coordinate in this question is 4, the equation of the vertical line passing through the point (4,3) and (4, 3) would be --> x = 4
<u><em>x = 4 is the answer</em></u>