Question

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

–5y = 5x + 10
a.
yes;1
b.
no
c.
yes; –5
d.
yes; 5

Answer 1

"Varies directly" means
y = k x
where k is some number

if you start with
–5y = 5x + 10
and divide both sides by -5 you get
y = -1 x - 2

if the -2 was not there, it would be direct variation
but the -2 is there, so it is not direct variation

Answer 2

thanks