An rmector's required rate of return on a mortgage, $k,$ is determined by the $$ and the

Mathematically, the general price movement of bonds can be modeled as which of the following?

$P_M=f(C,$ Prin $)$

$P_M=f(k,C,$ Prin $)$

$P_M=f(R_f,RP)$

$P_M=f(k,C)$