STEP-BY-STEP ANSWER:
Step 1: Understand that according to Keynes, individuals demand money for transaction and precautionary purposes, creating a preference for liquidity.
Step 2: Recognize that an increase in the money supply, holding other factors constant, reduces the demand for liquid assets, thereby lowering interest rates.
Step 3: Factor in that higher income and higher price levels can increase the demand for money, potentially driving interest rates upward.
Final Answer: The liquidity preference framework demonstrates that interest rates are determined by balancing the supply of money with the demand for liquidity, influenced by changes in money supply, income, and prices.