Answer:
y = 7.
y = -11.
y = -1.
Explanation:
All the verticals on the coordinate plane are either y-axis or parallel to the y-axis.
And the equations of all the vertical straight lines on the coordinate plane is given by y = c ........... (1), where c is any real constant.
Now, putting c = 0 we will get the equation of y-axis i.e. y = 0.
Therefore, y = 7 is the equation of a vertical passing through (3,7) points.
The equation of the vertical passing through (30,-11) is y = -11.
And the equation of the vertical passing through (0,-1) is y = -1. (Answer)