Find an equation of variation where y varies directly as x and y = 500 when x = 50.

y = ax

500 = a(50)

10 = a

y = 50x

y=ax diraect variation formula
500=a50 plug in what you have
10=a divide both sides by 50 to isolate the a
y=50x plug the a into the original formula

hope this helps! :)