Linear models example 1 | Algebra I | Khan Academy

Linear model for book reading

Algebra I on Khan Academy: Algebra is the language through which we describe patterns. Think of it as a shorthand, of sorts. As opposed to having to do something over and over again, algebra gives you a simple way to express that repetitive process. It's also seen as a "gatekeeper" subject. Once you achieve an understanding of algebra, the higher-level math subjects become accessible to you. Without it, it's impossible to move forward. It's used by people with lots of different jobs, like carpentry, engineering, and fashion design. In these tutorials, we'll cover a lot of ground. Some of the topics include linear equations, linear inequalities, linear functions, systems of equations, factoring expressions, quadratic expressions, exponents, functions, and ratios.

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[Orange]

Guys, you're totally missing the point here. He's not trying to teach you how to find the number of pages of a book. He's trying to teach how to build a linear model and what you can use it for. He just chose a simple question to explain the concept, that's all.

[musicsavedme]

For the people complaining about how difficult he’s making it and you can just do simple maths, some teachers (mine included) make us do it this way!

[peteratkinson]

(55x4)+(330)=550 and 4 hours+(330/55=6 hours)=10 hours

[davidlynch]

so when you do another video like this you should do multiple questions so then we can get more knowledge from it

[mikalahcarr]

couldn't you have done 55*4= 220 and then take 220+ 330, because 220 is how many pages he has read, and get 550 and the just divide that by 55 and get whole lot simplier....

[ayeeyee]

you can also divide the total pages of the book by the average pages per hour to get the time

[AndrewMaksymBrainNectar]

Couldn't we add the pages we figured out that he read, plus the amount he has left?

[berkgumus]

Great video! Thanks a lot for your efforts... However i have a question, i have received a task from my teacher which is to create a model and present it to the class. The models my teacher has solved is similar to the one in this video which is pretty short so i dont know what might be the thing i need to do here is there anything else we can do with a model that makes it more complex and suitable for a homework ? I hope i explained myself clearly here xd

[sherozbeksherozbek]

You should divide 550 by 55 than 330 It also give us required answer

[samoconnor]

Just know 55x4=220+330=550 and then do 550/5=10

[poobhagia]

I still dont understand as much on khan academy

[shamyshamuswow]

I rlly think he made that way more complicated than it is. 4h(55p) = -330 make -330 = 0 divide by rate per hour (55h)

[shaymamahmud]

if we send you questions would u solve them

[tradways]

what ever gets the job done. however, there is something profound to be said about efficiency and simplicity. therefore, WHY would i want to do this through such a long process? I really enjoy math, but I really hate doing things the harder longer way just because. What is the reason for doing simple math algebraically? Not smart assing, looking for a legit answer.

[sev]

Jesus! Why are you trying to make this hard for your viewers!
It’s a simple math!
(55*4+330) = number of pages. Number of pages/55 = number of hours to read at the rate of 55 per page.