Answer:
In the sentence above, the subordinate clause is "whoever wants to go to the football game". The type of subordinate clause is noun clause.
Explanation:
A noun clause is a dependent clause that acts as a noun. Therefore, noun clauses can act as subjects, direct objects, indirect objects, predicate nominatives, and objects of prepositions. In the sentence above, the noun clause is acting as the subject of the sentence. It is one of the arguments selected by the transitive verb to buy.