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anonymous
 one year ago
Identify which table shows a direct variation.
Table 1
x y
2 2
6 12
9 18
Table 2
x y
2 14
6 42
9 63
A.
Table 1
B.
Table 2
C.
Table 1 and Table 2
D.
Neither table
anonymous
 one year ago
Identify which table shows a direct variation. Table 1 x y 2 2 6 12 9 18 Table 2 x y 2 14 6 42 9 63 A. Table 1 B. Table 2 C. Table 1 and Table 2 D. Neither table

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freckles
 one year ago
Best ResponseYou've already chosen the best response.1ok do for direct variation we want this y=kx where k holds constant so table one we have: x y 2 2 6 12 9 18  this says when x=2 we have y=2 (amongst other stuff) so y=kx 2=k(2) this implies k should be 1 if this list of order pairs is to be a direct variation k=1 y=x so y=x should hold for all the other points on your list if it is a direct variation do you have y=x for each line of table 1?

freckles
 one year ago
Best ResponseYou've already chosen the best response.1so you are not sure if 6 is the same number as 12 or not?

freckles
 one year ago
Best ResponseYou've already chosen the best response.1or if 9 is the same number as 18 or not

freckles
 one year ago
Best ResponseYou've already chosen the best response.19 and 18 aren't the same number 6 and 12 aren't the same number

freckles
 one year ago
Best ResponseYou've already chosen the best response.1I think you know that deep down

freckles
 one year ago
Best ResponseYou've already chosen the best response.1I think you would know the difference between 9 dollars and 18 dollars

freckles
 one year ago
Best ResponseYou've already chosen the best response.1or 6 dollars and 12 dollars

freckles
 one year ago
Best ResponseYou've already chosen the best response.112 is more than 6 so they can't be equal 18 is more than 9 so they can't be equal

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i thought it was like a trick Q or sumpthing

freckles
 one year ago
Best ResponseYou've already chosen the best response.1no 6=12 means 6 is 12 which you know is not true

freckles
 one year ago
Best ResponseYou've already chosen the best response.1so the other points on your table do not fit into the equation y=x

freckles
 one year ago
Best ResponseYou've already chosen the best response.1which means table 1 is not a direct variation

freckles
 one year ago
Best ResponseYou've already chosen the best response.1ok again a direct variation is of the form y=kx where k holds constant

freckles
 one year ago
Best ResponseYou've already chosen the best response.1the first point listed on table 2 is (2,14)

freckles
 one year ago
Best ResponseYou've already chosen the best response.1find k such that (2,14) is on y=kx

freckles
 one year ago
Best ResponseYou've already chosen the best response.1just like I did before by pluggin in 14 for y and 2 for x

freckles
 one year ago
Best ResponseYou've already chosen the best response.114=k(2) or 14=2k can you solve this for k?

freckles
 one year ago
Best ResponseYou've already chosen the best response.1k is the constant of variation

freckles
 one year ago
Best ResponseYou've already chosen the best response.1k holds constant no matter what ordered pair (x,y) we have

freckles
 one year ago
Best ResponseYou've already chosen the best response.1y=kx k=7 so the equation is y=7x

freckles
 one year ago
Best ResponseYou've already chosen the best response.1does equation hold for the other points on your table?

freckles
 one year ago
Best ResponseYou've already chosen the best response.1so it is a direct variation Table 1 x y 2 2 6 12 9 18 dw:1435880449113:dw Table 2 x y 2 14 6 42 9 63 dw:1435880472148:dw

freckles
 one year ago
Best ResponseYou've already chosen the best response.1dw:1435880497051:dwdw:1435880509906:dw

freckles
 one year ago
Best ResponseYou've already chosen the best response.1when I said holds constant that is the same thing as saying it doesn't change; it is a number that remains the same through the multiplication (and I say multiplication because we are talking about direct variation)

freckles
 one year ago
Best ResponseYou've already chosen the best response.1T1 is meant to say table 1 TB2 is meant to say table 2 if you weren't sure where my abbreviations came from

freckles
 one year ago
Best ResponseYou've already chosen the best response.1any questions do you get it now ?

freckles
 one year ago
Best ResponseYou've already chosen the best response.1I gave you the answer above :p

freckles
 one year ago
Best ResponseYou've already chosen the best response.1no I did not say that at all

freckles
 one year ago
Best ResponseYou've already chosen the best response.1dw:1435880815810:dwdw:1435880837282:dw

freckles
 one year ago
Best ResponseYou've already chosen the best response.1yes but do you see why? x*k=y where k remained the same in table 2 but k did not remain the same in table 1

freckles
 one year ago
Best ResponseYou've already chosen the best response.1in order for k to be a constant by definition of constant it has to remain the same
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