Janu16
  • Janu16
Find the average rate of change for the given function from x=-1 to x=4.
Mathematics
chestercat
  • chestercat
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Janu16
  • Janu16
This
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Nnesha
  • Nnesha
average rate of change = slope
anonymous
  • anonymous
so x=-1 y= 5 x=4 y=-5

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Janu16
  • Janu16
Where is the 5 from
anonymous
  • anonymous
you just read it of your y axis
anonymous
  • anonymous
|dw:1437742695461:dw|
Janu16
  • Janu16
So how do you find the slope? -5-5 and 4-1?
anonymous
  • anonymous
no no
anonymous
  • anonymous
you got a formula for that
Janu16
  • Janu16
What formula
anonymous
  • anonymous
(y2-y1)/(x2-x1)
Janu16
  • Janu16
Thats what i did so what is y2 and y1
anonymous
  • anonymous
you got two points found . so you take a value for x1 so we can take x1=-1 so y1= 5 right?
Janu16
  • Janu16
So its -2?
Janu16
  • Janu16
Ya i solved it and got -2
anonymous
  • anonymous
then we fill in our other coordinates. x2=1 and y2 =-5
Janu16
  • Janu16
Isnt x2=4?
anonymous
  • anonymous
yes lol :p
Nnesha
  • Nnesha
sorry i was afk
anonymous
  • anonymous
anyhow you just fill in your twoo coordinates you found (x1,y1) and (x2,y2) in your formula
Janu16
  • Janu16
So it would be -5-5 which is -10 than 4- neg 1 which is 5 and you divide it than you have -2?
Janu16
  • Janu16
Its ok Nnesha
anonymous
  • anonymous
yes
Janu16
  • Janu16
Ok thank you yall
anonymous
  • anonymous
remember that you now have the slope but if u want an equation for this line the formula is y-y1=m(x-x1) and m is your slope you just calculated
Janu16
  • Janu16
I just wanted the slope and ya you use standard equation form for the equation. Thx
Janu16
  • Janu16
I mean point slope
anonymous
  • anonymous
yes but it's very important to see the whole picture! :)
Janu16
  • Janu16
Ya:)
Janu16
  • Janu16
Can you helo me with another one?
anonymous
  • anonymous
sure if i can :)
Janu16
  • Janu16
Ok i will do it on new thread

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