Final answer:
A state constitution functions to establish the rules and structure of government at the state level, define the powers and responsibilities of different branches of government, and outline the rights and protections of individuals within the state.
Step-by-step explanation:
A function of a state constitution is to establish the rules and structure of government at the state level. It defines the powers and responsibilities of different branches of government, such as the executive, legislative, and judicial branches. The constitution also outlines the rights and protections of individuals within the state. For example, it may guarantee freedom of speech and assembly, as well as protections against unreasonable searches and seizures.