Question

In a direct variation, y is -4 when x is 2. What is y when x = -14?

-28
-7
7
28

Answer 1

@Lama97

Answer 2

@SolomonZelman @rvc

Answer 3

@rvc do you know?

Answer 4

@Mashy

Answer 5

@mathmale

Answer 6

@tejasvir

Answer 7

@Abhisar im busy

Answer 8

okay first you have to find the common factor which we're gonna asign it as a variable of k ..

so a direct variation equation is

\[y=kx\] , where K is a constant..

for the first part of the question it says, y = -4 and x = 2 , so the only unknown value here is K , substitte the values of y and x in the equation

\[y= kx \]

\[-4 = 2k \]
\[\frac{ -4 }{ 2 } = k \]

\[k = -2\]

Answer 9

Okay so then would it be 28?

Answer 10

now for the second part of the question , we already have the scale factor. which is -2

substitute in the same equation to find y

therefore y = (-2) (-14)
y = 28

Answer 11

yes

Answer 12

Thanks! Could you help with more

Answer 13

alright, you can post it in a different thread and we can answer your question