Thoughts in math class....(help)

Allison5432's picture

Thoughts in math class....(help)

I do not understand direct variation at all...

"X and y vary directly", if x=7, when y=35 find:
(a) direct variation equation.
(b) y, when x=18

........what?! I don't understand this at all...someone please help me and examine this in terms I can understand