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Mathematics 20 Online
OpenStudy (anonymous):

x=-21

OpenStudy (anonymous):

it does?

OpenStudy (solomonzelman):

Yes, when you have x=-21, it is a vertical line, and goes up and down intersecting with the x-axis at point (-21,0). This line is in the 2nd and 3rd quadrant. It looks like this, https://www.desmos.com/calculator/mwn93q9qxn

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