anonymous
  • anonymous
Question inside :)
Mathematics
  • Stacey Warren - Expert brainly.com
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
|dw:1352783711712:dw|
anonymous
  • anonymous
graph A, graph B (top is A, bottom is B)
anonymous
  • anonymous
graph C, graph D (Top is C, bottom is D) *** the graphs are the answer choices.. idk which ... please help?

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More answers

anonymous
  • anonymous
idk, do u get it?
hartnn
  • hartnn
can u find intercepts ?
anonymous
  • anonymous
idk how to,.. can u pls show me?
hartnn
  • hartnn
for y-intercept, put x=0
anonymous
  • anonymous
what do i plug that into?
hartnn
  • hartnn
y=a(0+b)^(1/3)
anonymous
  • anonymous
and i get y=0?
hartnn
  • hartnn
so y-intercept is ab^(1/3) now since a and b are positive, y-intercept is also positive.
anonymous
  • anonymous
okay, so what does that mean??
hartnn
  • hartnn
which rules out A,C
anonymous
  • anonymous
okay so how do i figure out between B and D?
hartnn
  • hartnn
find x-intercept
anonymous
  • anonymous
how do i do that?
hartnn
  • hartnn
put y=0 in that equation
anonymous
  • anonymous
which one? the one we just found?
anonymous
  • anonymous
so i get this? 0=ab^(1/3) ??
hartnn
  • hartnn
the original one 0=a(x+b)^(1/3) so x= ?
anonymous
  • anonymous
so i get 0=(ax+ab)^1/3 ??? and idk how to find x= tho :(
hartnn
  • hartnn
0=a(x+b)^(1/3) (x+b) = 0 (because a is positive and not 0, x+b must be 0) so x=-b means x - intercept is negative
hartnn
  • hartnn
which graph among, B and d has x-intercept negative ?
anonymous
  • anonymous
okay, so hmmm is it B then?? the one i attached??
hartnn
  • hartnn
yes, its b
anonymous
  • anonymous
okay thanks!!! :)
hartnn
  • hartnn
DID U UNDERSTAND HOW ITS DONE ?
anonymous
  • anonymous
yeah :) find the intercepts and substitute and see whether it positive or negative... and u first find the first one and rule it out, then u narrow the answers down based on that intercept... then you find the next intercept and see if its pos or neg. and based on that u find ur graph. is that right? did i understand it correctly? :)
hartnn
  • hartnn
oh,yes ! :)
anonymous
  • anonymous
yayy!! :) thank youuu :)
hartnn
  • hartnn
what about finding intercepts, did u get how to find them ?
anonymous
  • anonymous
i think so... i do get confused about it tho sometimes... :( could u pls give me a summary on how to find them? so i understand them more clearly??

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