# Thread: table and graph "functions" look help

1. ## table and graph "functions" look help

i dont understand how i can get one answer out of the graph with so many points. can someone please solve this problem with the steps if possible. i looked in every page in my algebra book and looked online for about an hour and i just cant figure it out. someone please help

i need help with #15 as well. i tried just plugging in numbers and 4 but i couldnt get a pattern or one answer. i wish i had similar problems in my book so i didnt have to bug you guys, sorry.

2. Originally Posted by murkr
i dont understand how i can get one answer out of the graph with so many points. can someone please solve this problem with the steps if possible. i looked in every page in my algebra book and looked online for about an hour and i just cant figure it out. someone please help

i need help with #15 as well. i tried just plugging in numbers and 4 but i couldnt get a pattern or one answer. i wish i had similar problems in my book so i didnt have to bug you guys, sorry.

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These problems test your understanding of functions, in particular, composition of functions.

14) Look at f(g(-3)) from the inside out. That is, find g(-3) first. So, say you find that g(-3) = a, then you look up f(a).

15) This is the same setup, but instead of reading off the graph you have a table. Also the notation is slightly different but it's the same meaning, in this case, find f(g(4)).

3. Originally Posted by undefined
These problems test your understanding of functions, in particular, composition of functions.

14) Look at f(g(-3)) from the inside out. That is, find g(-3) first. So, say you find that g(-3) = a, then you look up f(a).

15) This is the same setup, but instead of reading off the graph you have a table. Also the notation is slightly different but it's the same meaning, in this case, find f(g(4)).

and for #15 i got the same answer 2 which was answer A. again did i do this right? please verify this, thanks man that was great help if i got these right you really made it easy for me to understand, and i believe when i come across this problem on the test ill get it right because of your help.

4. Originally Posted by murkr

and for #15 i got the same answer 2 which was answer A. again did i do this right? please verify this, thanks man that was great help if i got these right you really made it easy for me to understand, and i believe when i come across this problem on the test ill get it right because of your help.
I confirm your results. Showing work, this would be:

14)

g(-3) = 1
f(1) = 2

Therefore f(g(-3)) = 2

15)

f(g(4)) = f(8) = 2

Note that I wrote the work for 15 a bit differently from 14, but the logic is the same in both cases.