the lecturer is saying clear

the gradient of this line is equal to the amount of that function that increases in this interval divided by the length of the interval that we're considering this description is often just condensed to the expression rise over run where rise is the increase in the vertical direction and run is the distance along the horizontal axis so both rise here and runed down here

merriam-webster confirmed it is a legitimate word, without giving more explanation, so, what does "runed" mean? can anyone give another example sentence?

  • He's saying "run" not "runed". He's used the term "run" multiple times in the video, and clearly defined it in the same sentence "the distance along the horizontal axis". It's a fairly standard term when talking about lines in algebra. "Runed" is a word, but it's not math related. It means "inscribed with runes". As you might expect, it's not a very common word. – Andrew Jul 15 '19 at 3:04
  • Have you listened the time point yourself? He pronounced a 'd' very slowly and clearly. – user96188 Jul 15 '19 at 3:10
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    I'm voting to close this question as off-topic because it's based on a misunderstanding of a word used in a video. – Andrew Jul 15 '19 at 3:10
  • Yes I've listened to the video. You're hearing the "d" from the following word "down". But it's really just basic logic, yeah? Either the teacher is saying "run", a term known to every native English-speaking student learning about the slope of a line, or he's using the fairly obscure term "runed", which relates to an archaic form of writing, and which has nothing whatsoever to do with math. Which do you think is more likely? – Andrew Jul 15 '19 at 3:15
  • You got me! Please mv or cp your comments to answer. I'll accept it. – user96188 Jul 15 '19 at 3:22

As @Andrew said, the lecturer is saying "run", and the "d" from the following word "down".

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