please EXPLAIN this????

Algebra
Tutor: None Selected Time limit: 1 Day

The table below shows a direct variation. What is the value of m?

xy
1224
18m
2448
2
24
30
36
Mar 31st, 2015

36

y =2x

y = 2*18 when x=18

Mar 31st, 2015

thank you could u explain it a little more and i'll best your answer:)

Mar 31st, 2015

yes

When x=12 y =24

direct variation means y= kx

24 = k *12

k =24/12 =2

24 = 2*12

similarly 

48 =2*24

We need m which is y when x=18 ;

m= 2*18 =26


Mar 31st, 2015

Sorry , the last line is m=2*18 =36 

(typing mistake)

Mar 31st, 2015

Sorry , the last line is m=2*18 =36 

(typing mistake)

Mar 31st, 2015

thank you!!!!!

Mar 31st, 2015

I hope I made it clear.

Mar 31st, 2015

I hope I made it clear.

Mar 31st, 2015

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