我反倒覺得應該是"利率與利率影響下的均衡收入".
下面是英文原文：
For the investment—saving curve,the independent variable is the
interest rate and the dependent variable is the level of income.(Note
that economics graphs like this one typically place the independent
variable (interest rate,in this example) on the vertical axis rather
than the horizontal axis.)
說的意思是,在IS曲線中,自變量是利率,因變量是收入.（但經濟學的圖里,往往把自變量的利率放在Y軸上,這和一般數學里的規(guī)則不同.）
因此我覺得應該是利率和利率影響下的均衡收入.