Answer: increases and the interest rate rises.
Explanation:
As a result of the increase in a demand for investment, entities will borrow more money from financial institutions in order to undertake these investments.
Investments will therefore rise as a result. Unfortunately, due to the increase in demand for loanable funds from financial institutions, interest rates will rise as well to show that demand is increasing faster than supply of loanable funds as posited by the law of demand and supply.