Question

If y varies directly with x, Write an equation relating x and y when y = -30 and x = 6.

Answer 1

Answer:

$y=-5x$

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $y/x=k$ or $y=kx$

so

For $x=6,y=-30$

substitute

$y/x=k$------> $k=-30/6=-5$

therefore

$y=-5x$

Answer 2

Answer:

C.) Y = -5x

Step-by-step explanation:

5 x 6 = 30

So...

if x = 6 and y = -30

-30 would have to equal -30

-5 x 6 = -30

So...

Y = -5x is the correct option