anonymous
  • anonymous
help please! :) How do I graph f(x)= 8.5x<=40 12.75(x-40) x>40
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
f(x)=12.75(x-40) x>40*** its a piecewise function!
Loser66
  • Loser66
right?
anonymous
  • anonymous
yup!

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Loser66
  • Loser66
so, just graph one by one
anonymous
  • anonymous
wait oops
anonymous
  • anonymous
i meant 8.5x x<=40
Loser66
  • Loser66
ok|dw:1438830167577:dw|
Loser66
  • Loser66
the first one: f(x) = 8.5x, x =0, f(0) =? x =1, f(1) =?
anonymous
  • anonymous
f(0)=0 f(1)= 8.5
Loser66
  • Loser66
one more, x = 40, f(40) =??
anonymous
  • anonymous
340
Loser66
  • Loser66
|dw:1438830315845:dw|
Loser66
  • Loser66
34, not 340
anonymous
  • anonymous
oh oops hahah thanks!
Loser66
  • Loser66
The graph will stop there, at the point x =40, right? hence for the first piece, we have |dw:1438830483660:dw|
anonymous
  • anonymous
wait i can't graph (40, 34) bc the y axis given only goes up to 16
Loser66
  • Loser66
Ignore it, you need understand the concept before doing something else. Ok? Now, the second part, f(x) = 12.75(x-40) , if x =41, f(41) =??
anonymous
  • anonymous
12.75
Loser66
  • Loser66
one more, x =42, f(42) =
anonymous
  • anonymous
25.5
Loser66
  • Loser66
|dw:1438830723649:dw|
Loser66
  • Loser66
and we take the value of f for x >40, right?, hence take this part |dw:1438830862744:dw|
anonymous
  • anonymous
yeah i kind of get it! the restriction right?
Loser66
  • Loser66
ok, now combine the two.
Loser66
  • Loser66
|dw:1438830952038:dw|
Loser66
  • Loser66
hence your graph is |dw:1438831013456:dw|
Loser66
  • Loser66
got me?
anonymous
  • anonymous
yeah i get it!
Loser66
  • Loser66
Now, fix your given system.
anonymous
  • anonymous
wait what do you mean
Loser66
  • Loser66
It gives you the system is |dw:1438831085846:dw|
Loser66
  • Loser66
you just re-label the system, instead of 1,2,you put it 5, 10, 15..... |dw:1438831239279:dw|
anonymous
  • anonymous
yeah it already does it by 2's but im not sure if im supposed to relabel it but if i don't how would i show the restrictions
Loser66
  • Loser66
just take the last graph I showed you|dw:1438831384266:dw|
anonymous
  • anonymous
okay thank you so much!! :)

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