anonymous
  • anonymous
Help! Algebra!
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
The graph below shows the value of Edna's profits f(t), in dollars, after t months:
1 Attachment
anonymous
  • anonymous
@amoodarya @Astrophysics @Teddyiswatshecallsme @UsukiDoll @Elsa213
anonymous
  • anonymous
What is the closest approximate average rate of change for Edna's profits from the 18th month to the 21st month?

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welshfella
  • welshfella
that is the approximate slope of the graph for t=18 to t=21
welshfella
  • welshfella
approximately 45 / 3 per month
anonymous
  • anonymous
Three dollars per month Nine dollars per month 13.75 dollars per month 41.25 dollars per month So, 13.75?
welshfella
  • welshfella
yes
anonymous
  • anonymous
@phi what do you think?
phi
  • phi
find the (x,y) points on the parabola at x=18 and x=21 then find change in y divided by change in x change is x will be 21-18 = 3
anonymous
  • anonymous
So, it's 3?
phi
  • phi
no. what is the y value at x= 18 ?
welshfella
  • welshfella
the line is pretty thick so its not easy to read it accurately
anonymous
  • anonymous
About 5?
phi
  • phi
it looks like it is on the x-axis, so y=0 at x=18 what is the y value at x= 21 ?
anonymous
  • anonymous
41.25
phi
  • phi
so the change in y is 41.25 - 0 = 41.25 now find the slope change in y divided by change in x 41.25/3 = ?
anonymous
  • anonymous
A number.
anonymous
  • anonymous
LOL, JK, 13.75
phi
  • phi
which is roughly what welsh explained up above the answer depends on how accurately you can read the graph.
anonymous
  • anonymous
Well, welsh answered first, so, I'm gonna have to give the medal to him, sorry.
anonymous
  • anonymous
Thanks!

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