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Match the graphs of the functions on the left with the graphs of their derivatives on the right.

Mathematics
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Other answers:

Do you know what the derivative of a 2nd degree function is?
no
You know the following I guess: If f is decreasing, then f' is negative (and vice versa). If f is increasing, then f' is positive ( and vv).
yes
No look at the first graph on the left. To the left of the y-axis, it is decreasing, to the right it is increasing.
yes it does
This means, for f' you are looking for a function that is negative on the left side of the y-axis and positive on the right.
ok
so it will be #2 in the second attachment?
I can see it on one of your drawings on the right! Do you?
Yes it will be number 2 ?
so to will have letter A
No, I've got C
but you can't match a with c , it says to match the left with the right so it has to be a letter with a number
I mean this (see image) The parabola on the left (2nd degree function) has the straight line on the right as it's derivative.
1 Attachment
so number one will be 1 with letter c?
I meant number 2 sorry
so 2C ?
Yes
okay
Now try #2. See what it does: increasing, decreasing, increasing. So you're looking for a graph that is +, then -, then +.
i thought we already did number 2
?
He was telling you number #1 is C. There musta been some confusion there c:
ohhh okay lol sorry
so number 2 will be f?
Yes!
okay :)
I think you got it!
number 3 looks funny
I think #2 is `e` actually :o hmm
It is down, up, down, up, so look for -,+,-,+
okay so number 3 will be A ?
@zepdrix : you're right, I'm having trouble looking at three different pictures, @onegirl: sorry ;)
okay thanks for the correction zep
so 3A ?
Yes, 3A
okay
so number 4 will be D?
Right again! Always decreasing, so looking for a derivative that is always negative...
okay
so i'm guessing number 5 will be 5B?
?
You guessed wrong... Look at graph #5 and compare with #3
It behaves in the same way: dec, inc, dec, inc, so -,+,-,+
ok so it will be 5f
Oops, look something went wrong with my last response. Because 5 and 3 behave in the same way, you have to choose the same derivative: 5A
ohh ok
so letter A goes to two graphs? okay
That's the mean part of the question ;)
okay so how about the last one number 6?
It goes down, then up, then down, so for f' we have: neg, pos, neg
so it will be 6B
No, that goes a lot more from - to + etc.
(it is really simple)
ohh so it will f since it does go negative pos then neg
Yes, it's 6F. I must admit this kind of question can be confusing, because you constantly have to switch from increasing , decreasing to +, -.
okay well thanks for your help

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