Question

Which of the following is the equation of a direct variation that has a constant of variation equal to -1/2?



y=x-1/2
-1/2y=x
y= -2x
y= -1/2x

Answer 1

Why it is not B ???

Answer 2

ty :P

Answer 3

@ChrisNeedsHelp can you draw all the answers given???

Answer 4

@waterineyes why not C

Answer 5

@ Uncle Rocks let him draw first then I will explain it to you..

Answer 6

why not D? o.O

Answer 7

you replied me why not C the same I replied to monokeous..

Answer 8

No idea. I'd like to know though. Here's he graph for D. http://www.google.com/search?client=safari&rls=en&q=y=-1/2x&ie=UTF-8&oe=UTF-8#hl=en&client=safari&rls=en&sclient=psy-ab&q=y%3D(-1%2F2)x&oq=y%3D(-1%2F2)x&gs_l=serp.3..0i33i30.9230.11286.0.11482.2.2.0.0.0.0.144.277.0j2.2.0.ciatsh..0.0...1.p1En6yFK2ug&pbx=1&bav=on.2,or.r_gc.r_pw.r_cp.r_qf.,cf.osb&fp=1ed42ff16ab6ca34&biw=1224&bih=571

Answer 9

i cannot

Answer 10

Then tell me is x in the denominator in D option??

Answer 11

no

Answer 12

In B option is y in the denominator??

Answer 13

no

Answer 14

Oh. I see now.

Answer 15

Ok. :)

Answer 16

The answer will be D..

Answer 17

my reasoning is that i followed the y=mx+b

Answer 18

thanks guysys

Answer 19

No that is not the real reason @monokerous

Answer 20

oh?

Answer 21

Direct variation goes like this:

\[x = k \times y\]
and not:

\[k \times x = y\]

So, According to D;

\(y = k \times x\) is right..

But in B:

\(k \times y = x\) which is incorrect..

Answer 22

I see. Thanks for that. I understand now.

Answer 23

Welcome dear..