Parameter

Sign of derivative of $C\left(t,x\right)$

w.r.t parameter

Sign of derivative of

$r\left(t,x\right)$ w.r.t parameter

$k_1$

Positive

Negative

$k_2$

Positive if $C\left(t,x\right)>\frac{1}{2k_2}$ negative if $C\left(t,x\right)<\frac{1}{2k_2}$

NA

$v_0$

Zero

Negative

D

Zero

Positive