Which table shows a proportional relationship between x and y?

(posted below)

Question

Which table shows a proportional relationship between x and y?

(posted below)

anonymous · Answer

anonymous · Answer

I think it is c, is that right?

welshfella · Answer

check out the y values and see if y = kx for each entry
k will be some constant like 2,3 etc

welshfella · Answer

No 

because of the 0

anonymous · Answer

y because of the zero?

welshfella · Answer

well you have 8 = 4*2 as the second entry  -  making k = 4
but for first entry you have 8 = k * 0 which of course is wrong

welshfella · Answer

the values of k must be the same for all entries in the table

welshfella · Answer

divide the values of y by the values of x and see what you get 
try table B

anonymous · Answer

ok so b was my second answer is it proportional ?

welshfella · Answer

do you get it

Table B 

3 / 1 = ?
6 / 2 = ?

then do third and 4th entry

welshfella · Answer

see for yourself - do the divisions

welshfella · Answer

3/1 = 3
6/2 = 3
12/4 = ?
15/5 = ?

welshfella · Answer

6 /2 = 3 not 12

anonymous · Answer

I know I was just about to correct it

welshfella · Answer

ok

anonymous · Answer

12/4= 3
and...
15/5= 3

welshfella · Answer

right so
ity must be B

anonymous · Answer

oh! I didn't know how to solve these equations and now I do! Thank You :D

anonymous · Answer

oh and I believe number two is proportional and the ratio of dollars is 50$ per month is that right?

anonymous · Answer

anonymous · Answer

just to check