Given the following function, y = f(x), find the indicated values: f(0), f(-1), f(-3)
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OpenStudy (ranga):
The problem is incomplete. What is the function f(x)?
OpenStudy (anonymous):
just substitute that value for every x in the function. So if your funtion is 4x-3, then for f(-1) just put it as: 4(x)-3 = 4(-1)-3 = -4-3 = -7
f(-3) = 4(x)-3 = 4(-3)-3 = -12-3 = -15
:)
OpenStudy (anonymous):
here is the graph
OpenStudy (anonymous):
OpenStudy (anonymous):
sorry the first graph is to a different problem, the 2nd graph is right
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OpenStudy (anonymous):
ok
So you have to match up where the x coordinates are according to the y coordinates, so when f(0), that means your x=0, so when x=0, your y value is at y=-5
OpenStudy (anonymous):
Unless they want you to make an equation out of the graph and then solve
OpenStudy (anonymous):
When it asks for f(0) would it be -5 or (-3,1)
Im confused
OpenStudy (anonymous):
oh ok so it would be the -5
OpenStudy (ranga):
Yes.
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OpenStudy (anonymous):
so for f(-1) it would be x=-7
OpenStudy (anonymous):
yes :)
OpenStudy (ranga):
Find f(0) means what is the y value when x = 0
OpenStudy (anonymous):
and f(-3) would be x=0
OpenStudy (anonymous):
but
remember its y you are looking for not x
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OpenStudy (anonymous):
So your typing f(-3) is x=0, but it should be y=0
OpenStudy (ranga):
f(-3) means what is the y value when x = -3?
OpenStudy (anonymous):
but actually when f(-3), then y=1
OpenStudy (anonymous):
ok great I think I figured it...thank you guys so much
OpenStudy (anonymous):
just remember that f(x)= means the same thing as y=
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OpenStudy (anonymous):
yea y=1 when f(-3)
OpenStudy (anonymous):
Exactly !
OpenStudy (anonymous):
cool great
OpenStudy (anonymous):
that helped a lot
OpenStudy (ranga):
What do you get for f(-1)?
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OpenStudy (anonymous):
y=-7
OpenStudy (ranga):
You got it!
OpenStudy (anonymous):
heehaw, lol
OpenStudy (anonymous):
Yay good job :)
OpenStudy (anonymous):
thanks again for the help, you all have a good one
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