Answer: Demand will fall, Interest rates will fall
Step-by-step explanation:
The investment tax credit would have encouraged more companies to seek loanable funds in order to embark on investment opportunities because they would be taxed less. This increase in demand in the market for loanable funds would have led to rates rising to keep up with demand.
If Congress were to end this credit, the incentive to invest and avoid tax would be gone. Companies would therefore demand less loanable funds and with this drop in demand there will be a drop in interest rates as well to entice people to borrow at the lower rates.