Question

Math Help Please!!!!
Write an equation of the direct variation that includes the point (9, -12).

A) y = 1 1/3x
B) y = -1 1/3x
C)y = -3/4x
D) y = -1/12x

Answer 1

y=kx
-12= k9 solve for k @Answers101

Answer 2

@Answers101 u there?

Answer 3

Yes

Answer 4

so what's -12/9 ?

Answer 5

remember what i wrote in the other post
\[\large y=\frac{k}{x}\]
if the point lies on the graph of the equation then we just substitute x and y by (9, -12)
to find k
so \[\Large -12=\frac{k}{9} \Longrightarrow k=-12\times9=-108\]

Answer 6

1 1/3 @Godlovesme

Answer 7

i think u forgot the -ve sign @Answers101

Answer 8

oops we are looking for a direct variation i did the opposite
\[y=kx \Longrightarrow -12=9k \Longrightarrow k=\frac{-12}{9}=\frac{-4}{3}\]
so the final answer is \[y=\frac{-4}{3}x\]

Answer 9

pls make sure what you post
errors in your choices ????

Answer 10

@Answers101 see here!!