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Mathematics 11 Online
OpenStudy (ajanijones):

Pic in description. Identify which table shows a direct variation. Two tables. For each table the column headings are x and y. Table 1 has column one values of 1, 2, 3 and column 2 values of 19, 38, 57. Table 2 has column 1 values 5, 6, 7 and column 2 values 48, 72, 84. A. Table 1 only B. Table 2 only C. both tables D. neither table

OpenStudy (ajanijones):

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OpenStudy (ajanijones):

@Mason_Jones573

OpenStudy (anonymous):

idk

OpenStudy (ajanijones):

@arabpride

OpenStudy (ajanijones):

@Isaiah.Feynman @Taylor<3sRin @Marco,Phillip @undeadknight26 @johnweldon1993 @Awesome781

OpenStudy (johnweldon1993):

If it is varying jointly....each individual 'x' would be multiplied by the same number to arrive at the corresponding 'y'

OpenStudy (ajanijones):

I would think the answer would be B.

OpenStudy (johnweldon1993):

Lets test that answer....if it is table B.... x = 5 y = 48.....what number do you multiply 5 by..to get 48?

OpenStudy (ajanijones):

you cant. it would have to be 6 times 8 = 48

OpenStudy (johnweldon1993):

....you can do it...it would just be a decimal... \[\large \frac{48}{5} = 9.6\]

OpenStudy (ajanijones):

But if X =6 and Y = 72 then you multiply 6 with 12 to get 72.

OpenStudy (johnweldon1993):

RIGHT! what I just wrote above....says that you would need to multiply every 'x' by 9.6 to get the 'y' and as you just stated....you would need to multiply 6 by 12 to reach 72....now 9.6....so this means table 2 does NOT vary directly

OpenStudy (ajanijones):

Ok so now we have to see if table 1 does so X = 1 and Y = 19 so 1 times 19 so times every thing by 19 to get Y right.

OpenStudy (johnweldon1993):

Correct....and does it work out?

OpenStudy (ajanijones):

So looking at it my answer would be A table 1

OpenStudy (ajanijones):

Because it does work.

OpenStudy (johnweldon1993):

There you go!

OpenStudy (ajanijones):

Am I right or not :L

OpenStudy (johnweldon1993):

Yeah Table 1 is correct

OpenStudy (ajanijones):

Wait I have another one that. can you check it I got D as my anes 104.|dw:1400515927324:dw|

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