Math Is Fun Forum

numquester

Member

Registered: 2016-12-12

Posts: 19

Plotting vertical line in Geogebra?

I'm relearning algebra after some years of being away from school, and I'm learning to use Geogrebra.  At the moment I'm plotting some lines to get a sense of what elementary functions look like on a grid.  I never really got a good sense of this when I was in school.

So I have:

f(x) = x , which gives a diaganol line.
f(x) = -x , which gives a mirror of the above diagonal line (Is there a math term for this?).
f(x) = 0x , which gives a horizontal line.

How would I plot a vertical line?  The closest that I have found is:

f(x) = 10^(100)x

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Plotting vertical line in Geogebra?

Hi;

Welcome to the forum. x = 5 or x = -3 or x = 100 all plot vertical lines.

f(x) = 10^(100)x does not plot a vertical line, it is an illusion of scale.

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

numquester

Member

Registered: 2016-12-12

Posts: 19

Re: Plotting vertical line in Geogebra?

Thanks.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Plotting vertical line in Geogebra?

Hi;

Good to see you getting back into math and smart to use some modern tools like Geogebra to assist you.

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.