for each of the following cases ,tell whether the relationship is positive, negative or no correlation.

1.The more students enrolled in a school ,the more teachers needed.
2.The wealthier a person is ,the more friends he has.
3.A student who has many absences has a decrease in grades.
4.As one increase in age,often ones agility decrease.
5.The longer your hair grows the More shampoo you will need.​