COURSE REGISTRATION Students at a sta college may preregister for their fall classes by mail during the summer. Those who do not preregister must register in person in Septemb The registrar can process $35$ students per houf during the September registration period. Supp that after $4$ hours in September, a total of $360$ students $($including those who preregistere have been registered.

Wo Exress the number of students registered as a wunction of time and draw the graph.

How many students were registered after $3$ liours?

How many students preregistered during the summer?