The Supreme Court receives about 10,000 petitions a year. The Justices use the "Rule of Four” to decide if they will take the case. If four of the nine Justices feel the case has value, they will issue a writ of certiorari. ... The majority of the Supreme Court's cases today are heard on appeal from the lower courts.
Explanation:
Parties who are not satisfied with the decision of a lower court must petition the U.S. Supreme Court to hear their case. The primary means to petition the court for review is to ask it to grant a writ of certiorari. ... According to these rules, four of the nine Justices must vote to accept a case.
