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Select the equation which graphs to a vertical line at -3.

A) y=-3
B) x=-3
C) y=-3x
D) x=-3y

1 Answer

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Answer: B) x = -3

Every point on this line has one thing in common: the x coordinate is -3. This is why x is fixed at -3, so we simply say the equation is x = -3

Some example points on this line are (-3,10) and (-3,2)

The y coordinate can be anything you want, so that is why it doesn't show up at all (because it doesn't affect how x will turn out).

User Anmol Saraf
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