How to plot c(t) vs t with these parameters for various values of v

How to plot c(t) vs t with these parameters for various values of v

c(t)=c0-c03*k*(1/cmin-1/cmax)*v*u(t)

where, u(t)=1, t≥0 0, t<0

Cmin=10e-9 Cmax=10e-6 C0=100e-9 K=10e6

Thanks in advance