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Could someone please explain to me why the line x=4 is a vertical line.
Thank you.

  • Algebra -

    Because x has to be 4 while y can be anything. A vertical line through (4,0)contains all points for which x=4.

  • Algebra -

    Pick any two ordered pairs that satisfy the equation, remember all it said was x = 4

    how about (4,0) and (4,5) ? Do they satisfy our condition that x = 4 ?

    Plot the points and draw the line.

    Mmmmhhh ?

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