Question

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

–5y = –2x
a.
yes; –2
b.
yes; 5/2
c.
yes; 2/5
d.
no

Answer 1

y varies directly with x if you can write an equation of the form:

\[y=kx\]
where k is some constant number.
So solve your equation for y and you should be able to figure out the question. :)