Question

Determine whether y varies directly with x. If so, find the constant of variation k. 7y = –x

a.
yes; –1
b.
yes; -1/7
c.
yes; -7
d.
no

Answer 1

Answer: B



Explanation: comment above me LOL

Answer 2

b

Explanation:

The equation of quantities in direct variation is

y = kx ← k is the constant of variation

Given

7y = - x ( divide both sides by 7 )

y = -
`(1)/(7)` x ← in direct variation form

with k = -
`(1)/(7)`