ayeedomo
  • ayeedomo
Please help with turning coordinates into function: (5,2),(6,5),(7,8),(8,11)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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ayeedomo
  • ayeedomo
@pooja195
ayeedomo
  • ayeedomo
@caozeyuan
caozeyuan
  • caozeyuan
what do you mean? coord into func?!

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ayeedomo
  • ayeedomo
I mean like the "y = __x + __"
ayeedomo
  • ayeedomo
?
caozeyuan
  • caozeyuan
ok but you don't need 4 pooints for that
ayeedomo
  • ayeedomo
hmm
caozeyuan
  • caozeyuan
ok, so these are on the same line
caozeyuan
  • caozeyuan
so m =dy/dx, dy=5-2=3, dx=6-5=1, so m=3
anonymous
  • anonymous
|dw:1449725631633:dw|
caozeyuan
  • caozeyuan
@magepker728 , I just plotted them, its a line
ayeedomo
  • ayeedomo
woah this is confusing
caozeyuan
  • caozeyuan
5-3*6=-13, so b is -13
caozeyuan
  • caozeyuan
it IS a line
ayeedomo
  • ayeedomo
This was the actual question I need help with: "Compare the data in the table with the relation f(x) = 2x + 13. Which relation has a greater value when x = 7?" The plot x and y numbers are all of the data from the table.
anonymous
  • anonymous
|dw:1449727366769:dw|
caozeyuan
  • caozeyuan
you should said that in the first place
caozeyuan
  • caozeyuan
so impressive LA here
caozeyuan
  • caozeyuan
*some
caozeyuan
  • caozeyuan
which is bigger 2*7+13 or 8?
caozeyuan
  • caozeyuan
this Q could have been so much easier
ayeedomo
  • ayeedomo
2*7 + 13 is larger than 8 (And sorry, I thought that over all it was the same thing)
caozeyuan
  • caozeyuan
there you go,
ayeedomo
  • ayeedomo
but where did the numbers come from?
ayeedomo
  • ayeedomo
:(
ayeedomo
  • ayeedomo
@hartnn
caozeyuan
  • caozeyuan
given (7,8) is on line y=mx+b, if x is 7 what is y?
ayeedomo
  • ayeedomo
8 is y right?
caozeyuan
  • caozeyuan
that's why the equation is useless
ayeedomo
  • ayeedomo
whpalmer4
  • whpalmer4
Jeepers, making this complicated! \[(5,2),(6,5),(7,8),(8,11)\] x goes from 5 to 6, y goes from 2 to 5, increasing by 3 x goes from 6 to 7, y goes from 5 to 8, increasing by 3 x goes from 7 to 8, y goes from 8 to 11, increasing by 3 See the pattern? For every 1 increase in x, we get an increase of 3 in y. That means the slope is (drum roll...) 3 Substituting into our slope-intercept form\[y=mx + b\]where \(m\) is the slope and \(b\) is the \(y\)-intercept, we get: \[y = 3x + b\]We just need to find the value of \(b\) to make the data fit. Any point in the table will work. Let's use the first one, \((5,2)\): \[2 = 3(5) + b\]\[2 = 15+b\]\[b = -13\] Our equation is \[y = 3x-13\] Pick another point and try it: \[11 = 3(8) - 13\]\[11=24-13\]\[11=11\checkmark\]
ayeedomo
  • ayeedomo
YAYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY!!!! Thank you I've been trying to figure this out for over an hour :)

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