Math question

Seth8530 · 04-18-12, 08:24 AM

Quote:

Originally Posted by Neal Stevens

@ Gargamel

While doing the exercises at Khan Academy, finding the slope of a line, there was one example where the text shows

m = y1-y2/x1-x2

Now, that's different from everything else they show, and everything else I can find on the web, where slope is clearly defined as

m = y2-y1/x2-x1

That's the correct definition, right? There's no y1-y2 version is there? Or does it not make a difference?

There are equivalent because with the first equation say you get -3/1 after the calculation. with the second one using the same numbers you would get 3/-1 which are equivalent.

Gargamel · 04-18-12, 08:36 AM

The sequence doesnt matter too much as long as you keep to pairs together. (x1,y1) & (x2,y2).

Think of it as plotting an intercept for a convoy.

Dan D · 04-22-12, 02:20 PM

@Neal

Next time you get pulled over by the police for not stopping at a stop sign you can fight the ticket with your new math skills:

The Proof of Innocence

Date of article is 1.April 2012 though, could be a mathematician joke. Is it?

Gargamel · 04-22-12, 02:25 PM

The paper is real, but it's not why he got out of the ticket.

Dan D · 04-22-12, 02:29 PM

Quote:

Originally Posted by Gargamel

The paper is real, but it's not why he got out of the ticket.

What do you mean when you say:"it's not why he got out of the ticket"?

Onkel Neal · 04-22-12, 05:43 PM

Quote:

Originally Posted by Dan D

@Neal

Next time you get pulled over by the police for not stopping at a stop sign you can fight the ticket with your new math skills:

The Proof of Innocence

Date of article is 1.April 2012 though, could be a mathematician joke. Is it?

Beautiful!

Quote:

Originally Posted by Gargamel

The sequence doesnt matter too much as long as you keep to pairs together. (x1,y1) & (x2,y2).

Think of it as plotting an intercept for a convoy.

Quote:

Originally Posted by Seth8530

There are equivalent because with the first equation say you get -3/1 after the calculation. with the second one using the same numbers you would get 3/-1 which are equivalent.

Yeah, thanks, I finally proved that out to my satisfaction.

Gargamel · 04-22-12, 05:57 PM

The judge ruled the cop was too far away to see the intersection. It had nothing to do with the paper.

There was a physicist here in Cleveland at NASA that got out of a speeding ticket a while though. He tried to show the radar gun couldn't be used as the cop was using it. The judge didn't buy it until the physicist showed the judge the patent for the radar gun, with his name on it.

04-18-12, 08:36 AM	#2
Gargamel Lucky Sailor Join Date: Oct 2010 Location: Rome Posts: 4,273 Downloads: 81 Uploads: 0	The sequence doesnt matter too much as long as you keep to pairs together. (x1,y1) & (x2,y2). Think of it as plotting an intercept for a convoy. __________________ Luck is a residue of Design.

04-22-12, 02:20 PM	#3
Dan D Grey Wolf Join Date: Jul 2002 Location: 9th Flotilla Posts: 839 Downloads: 0 Uploads: 0	@Neal Next time you get pulled over by the police for not stopping at a stop sign you can fight the ticket with your new math skills: The Proof of Innocence Date of article is 1.April 2012 though, could be a mathematician joke. Is it? __________________

04-22-12, 02:25 PM	#4
Gargamel Lucky Sailor Join Date: Oct 2010 Location: Rome Posts: 4,273 Downloads: 81 Uploads: 0	The paper is real, but it's not why he got out of the ticket. __________________ Luck is a residue of Design.

04-22-12, 05:57 PM	#7
Gargamel Lucky Sailor Join Date: Oct 2010 Location: Rome Posts: 4,273 Downloads: 81 Uploads: 0	The judge ruled the cop was too far away to see the intersection. It had nothing to do with the paper. There was a physicist here in Cleveland at NASA that got out of a speeding ticket a while though. He tried to show the radar gun couldn't be used as the cop was using it. The judge didn't buy it until the physicist showed the judge the patent for the radar gun, with his name on it. __________________ Luck is a residue of Design.