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5-1 Solvin Systems of Equations by Graphing video 1

Added Nov 29, 2016 •

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hello guys I decided cuz I gave you this on your homework last night that I should probably go over it it's a little bit harder I thought it might be better if I went over it and some notes so these are on yesterday's Cornell notes so you need Takis I can't make sure you have that out still go ahead and do that about to start off with number 3 and we are writing a piece functions of will go ahead I'm going to call this one line one this one line 2 turn it up that extra line in there sorry  this one still line to all right and so 4 line 1 I have light equals MX plus b it hits my Y intercept at Nega one  and then my slope remember I want to look at perfect points so I'm going to go up one  left one one is positive left one is negative so my slope is 1 / -1 and then that just simplifies to  negative x minus one  it's my first line for my second line I have y equals IMAX plus p and then it hits the y-axis at 2 for that second line and then again I want to look for perfect points see another perfect white here and then I went up one right one  one one and they are both going to be positive  so then my slope is 1/1 and I have an X  simplify adjust x + 2 equals why then I have f of x equals ass and then  my Majin s and then a curb easy  and I'm going to take my two men's negative x minus one x + 2 and then only part where missing now is my any qualities so I look back sorry that I don't know if I was just quiet for that amount of time something happened to my screen your scrap and I noticed that it is on the left side and the left side is negative so I have exit is less than or two zero  because it's on the zeroline that's where my barrier is and then for my other line I'm too I have X and the sign time is on the right side of my graph so I'm going to have greater than or equal to 0 turn in for my other one number for this one's tough one I don't expect you guys to get this one right but I was hoping you guys would at least try it this one I have grass one I have graft you and I have graph so we kind of have to imagine here for a second imagine if this line kept going  for number one where would it hit that line and it would hit my y-intercept at -2 so I have negative 2 and then I look at my slope perfect point to perfect point up one left one so that's positive one and negative one making my slope  negative over 1 simplify negative X Mask feel like I'm going to run out of space for this on there might have to write about okay that's the first line I know that was kind of tricky because you had to imagine things but you just  extend the line a little bit and see where would it hit your y-intercept blind to that flat line in the middle of member we looked at that type of line yesterday what does y equal here and this line right here what number is it at its at 2 so y equals 2 and the number 3  again I'm going to come to do some imagination here for a second and I'm going to extend this other line using the same slope so this slope right here  I went up to right one so using the same slope slope don't you left one and not hits that hits my white intercept at -3  and then we just looked at my slope up you write 1 spinal cord equation y equals 2x - 3 alright now I got my three lines and I'm going to go back to where my barriers would be so if I were to look at those barriers I have one right here and I have one right here cuz those are way your dots line up can someone write my equations in my function notation f of x equals remember I turn S and then a Kirby's and I write the equation of the first line I have negative x -2 write the next one I have which is to and then last but not least  2 x -3  play after you do now we got to look at your domains  when I look at my first yellow line right here I see that X is at -2 and I'm on the left side of -2 and it's a closed Circle  X is less than or equal to then I look at my middle line that Flatline numbered line to K and I look at my ex values and that's between negative and positive one  and then both of my circles are open anytime I'm in between two numbers always going to use the less than signs or still talking about EX  last but certainly not least I'm still talking about next that is also the one line where that the second highlighted line is it's in close Circle so it's going to solid line underneath and it is shaded to the right  therefore it's going to be greater than I know that one was tough but this video is already 8 minutes long so you take how much time on it if you got it great if you didn't write it down and we'll talk more about it tomorrow I'm going to start my next video

Uploaded by Lauren Stouffer.

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5-1 Solvin Systems of Equations by Graphing video 1

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