Answer:
[tex]x=1[/tex]
Step-by-step explanation:
The point is [tex](1,-9)[/tex]. This means the value of [tex]x[/tex] is [tex]1[/tex] and value of [tex]y[/tex] is [tex]-9[/tex].
Vertical line means that the point has the value of [tex]y[/tex] axis as zero [tex](0)[/tex].
Since, the point has [tex]x[/tex] value [tex]1[/tex] the vertical line passing through it will be [tex](1,0)[/tex] which means [tex]x=1[/tex].
