Question

Write the equation of direct variation for x = -5 and y = 90

Answer 1

It's easier than you may seem. Recall the direction variation equation I gave you earlier: \[\frac{ y }{ x }=k\] Just plug in your numbers and you have your equation. Some teachers can be picky about which form they'd like it in, so I would write it in both \[\frac{ y }{ x }=k\] AND \[y=kx\]

Answer 2

okay i got -18

Answer 3

is is 90=(-18)-5

Answer 4

Since it asks just for the equation, you don't even half to solve. Just plug in the numbers into the equation and that's it.

Answer 5

kk

Answer 6

so just put it like this 90=k-5

Answer 7

If you mean multiply k by (-5) and not subtract, then yes.

Answer 8

kk XD

Answer 9

But some teachers can get picky about which form they want, so I'd plug it into both forms.