If y varies directly as x, and y is 18 when x is 5, which expression can be used to find the value of y when x is 11?
A
y = StartFraction 5 Over 18 EndFraction (11)
B
y = StartFraction 18 Over 5 EndFraction (11)
C
y = StartFraction (18) (5) Over 11 EndFraction
D
y = StartFraction 11 Over (18) (5) EndFraction