mckenzieandjesus
  • mckenzieandjesus
Graph the data in the table below. Which kind of function best models the data? Write an equation to model the data. quadratic; y = –x2 + 2x – 3 linear; y = – 2x – 3 exponential; y = –3•1.5x quadratic; y = –x2 – 3
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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mckenzieandjesus
  • mckenzieandjesus
|dw:1444433891025:dw|
mckenzieandjesus
  • mckenzieandjesus
@jim_thompson5910
jim_thompson5910
  • jim_thompson5910
what do you have so far (in terms of work)?

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More answers

mckenzieandjesus
  • mckenzieandjesus
I dont understand how to do it
jim_thompson5910
  • jim_thompson5910
ok let's say we pick on choice B linear; y = – 2x – 3
jim_thompson5910
  • jim_thompson5910
IF the answer was choice B, then (0,-3) should lie on the graph so should (1,-2) and (2,-3) etc etc
jim_thompson5910
  • jim_thompson5910
but what is the value of y when x = 1 y = – 2x – 3 y = -2*1 - 3 y = ??
mckenzieandjesus
  • mckenzieandjesus
-5?
jim_thompson5910
  • jim_thompson5910
yes so (1,-5) is actually on y = – 2x – 3 not (1,-2)
jim_thompson5910
  • jim_thompson5910
this eliminates choice B
mckenzieandjesus
  • mckenzieandjesus
ok
jim_thompson5910
  • jim_thompson5910
test the points with the other equations. You need to make sure all points fit
mckenzieandjesus
  • mckenzieandjesus
so would i do -2*2-3?
mckenzieandjesus
  • mckenzieandjesus
nvrm!
jim_thompson5910
  • jim_thompson5910
well you could, but we proved B wasn't the answer. So there's no need to check B any more
mckenzieandjesus
  • mckenzieandjesus
got it nvrm lol
jim_thompson5910
  • jim_thompson5910
alright
mckenzieandjesus
  • mckenzieandjesus
Would the answer be A?
jim_thompson5910
  • jim_thompson5910
yes
mckenzieandjesus
  • mckenzieandjesus
Thank You!. I never understood those but now I do. A lot simpler than I thought.

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