Please hurry

The number of hours of sick leave, s, an
employee of a company earns varies
directly with the number of weeks, t,
he or she works. An employee of the
company who works 4 weeks earns
9 hours of sick leave. Which equation
represents the relation between s and t?
A S= 9t
B S = 4t - 9
C S = 4t + 9
D t = 8-4
E t = 9s - 4