Question

Choose the equation of the vertical line passing through the point (1, -1).

x = -1
y = 1
y = -1
x = 1

Answer 1

the equation for any vertical line,i.e parallel to y axis is x=k

Answer 2

the line passes through (1,-1), so that value of x will satisfy the equation

Answer 3

so,you are getting k=1, and the right answer is x=1