Question

Which of the folowing is a vertical line?
y=3
y = 3×+2
×=4
y =1×
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Answer 1

Answer:

y = 1x

explanation-

y=mx+c

m=slope=tanA

tan90 = vertical

tan90 = 1

thus, eqn of a vertical line will be in the form y = 1x+c

y=1x can be written as y=1x+0