假设消费者信心提高增加了消费者未来收入的预期，从而他们现在想消费的数量增加。可以把这种情况解释为消费函

数向上移动。这种移动如何影响投资和利率？

Suppose that all increase in consumer confidence raises consumers' expectations of future income and thus the amount they want to consume today. This might be interpreted as an upward shift in the consumption function. How does this shift affect investment and the interest rate？