Mathematics
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OpenStudy (calculusxy):
MEDAL for help!!!!
Question is posted below:
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OpenStudy (calculusxy):
Write a set of walking instructions based on the data in Tables A and B.
OpenStudy (calculusxy):
@Michele_Laino
OpenStudy (calculusxy):
What do they mean by "walking instructions''?
OpenStudy (michele_laino):
maybe the function distance as function of time for both tables A and B
OpenStudy (michele_laino):
I'm not sure
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OpenStudy (michele_laino):
do you know the least square method, for statistical processing of data?
OpenStudy (calculusxy):
No
OpenStudy (calculusxy):
But I can learn !
OpenStudy (michele_laino):
what subject are you studying at your school?
OpenStudy (calculusxy):
Well i am a rising eight grader...
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OpenStudy (calculusxy):
And it's just math, latin, english, history, and physics.
OpenStudy (michele_laino):
please wait, I'm working on your answer...
OpenStudy (calculusxy):
Okay
OpenStudy (michele_laino):
I understand.
We have to write two functions which model your data contained in both tables
OpenStudy (michele_laino):
for example, let's consider the first table
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OpenStudy (calculusxy):
so can we use:
y = mx +b
OpenStudy (michele_laino):
yes! that's right!
OpenStudy (calculusxy):
Okay so to find m:
\[\frac{ (y_2 - y_1) }{ (x_2 -x_1) }\]
OpenStudy (michele_laino):
when x=0, we have y=0.8, so we can write:
0.8=m*0+b=b
so b=0.8
OpenStudy (calculusxy):
So i am going to use the coordinates:
(1,1) and (2,1.2)
\[\frac{ (1.2 - 1) }{ (2 -1 ) }\]
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OpenStudy (michele_laino):
similarly, when x=1, we have y=1
so we can write:
1=m*1+b=m+b=m+0.8
then:
m=1-0.8=0.2
I prefer the substitution method
OpenStudy (calculusxy):
\[\frac{ 0.2 }{ 1 }\]
OpenStudy (michele_laino):
ok! so we can write:
y=0.2*x+0.8
OpenStudy (calculusxy):
yes
OpenStudy (michele_laino):
now we have to do the same, with the second table
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OpenStudy (calculusxy):
for b:\[\frac{ 3.2 - 3.6 }{ 3 -2 }\]
OpenStudy (calculusxy):
That would show a negative slope right?
OpenStudy (michele_laino):
yes! it is -0.4
OpenStudy (calculusxy):
\[\frac{ -0.4 }{ 1 }\]
OpenStudy (michele_laino):
ok!
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OpenStudy (calculusxy):
so y = -0.4x + 4
OpenStudy (michele_laino):
so the requested function is:
y=-0.4*x+4
OpenStudy (calculusxy):
So those are the two answers right?
OpenStudy (michele_laino):
yes! right!
OpenStudy (calculusxy):
Can you please help me with my physics homework as well?
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OpenStudy (michele_laino):
ok!
OpenStudy (calculusxy):
Thank you i will make a new post
OpenStudy (michele_laino):
ok!