Question

Which of the following equations represents a direct variation?
1. y = x + 8
2. y = 8
3. y = 8x
4. y = 8/x

Answer 1

y = 8x

Answer 2

http://www.google.com/imgres?hl=en&client=ubuntu&hs=G8l&sa=X&channel=fs&biw=1668&bih=821&tbm=isch&prmd=imvns&tbnid=WyYEJxvnL5VqcM:&imgrefurl=http://tzvetkova.wordpress.com/2011/07/02/3-years-old/&docid=EthA15lM3bQX9M&imgurl=http://tzvetkova.files.wordpress.com/2011/06/3_1.png&w=421&h=600&ei=MBYDT_DBK4TV0QHa29DIAg&zoom=1&iact=hc&vpx=1193&vpy=101&dur=63&hovh=268&hovw=188&tx=82&ty=171&sig=102920002159830328980&page=1&tbnh=144&tbnw=101&start=0&ndsp=38&ved=1t:429,r:26,s:0

Answer 3

I think the third, second and first represent direct variation because only in the fourth one, x is in the denominator.

Answer 4

thanks for the picture @satellite73...

Answer 5

i think its 1st and 3rd not second as there is nox in the 2nd....................