Question 677088
An undefined slope will yield a vertical line.
...
Using the point(-4,0) indicates that it is a vertical line through the x axis at -4.
...
Equation of the line is {{{highlight_green(x=-4)}}}
...
.....................
Delighted to help.
-Reading Boosters
Website: www.MyHomeworkAnswers.com 
Wanting for others what we want for ourselves.