ratprint:false;
wxplot_size:[400,300];
kill(y,a,b,r,c,t);
eq:y(t)+r*c*'diff(y(t),t)=b;
atvalue(y(t),t=0,a);
sol:desolve(eq,y(t));
f(t,r,c,a,b) := ev(rhs(sol));
display(f(t,r,c,a,b));
wxplot2d(
f(t,10000,100*1e-6,0,12),
[t,0,5],
[gnuplot_preamble, "set grid;"],
[nticks,12]);