Wie zeichne ich... eine Exponentialfunktion auf einfach-logarithmischem Papier?

clear all;
U = [28.6 13.4 7.67 4.11 1.94]
U = 1×5
   28.6000   13.4000    7.6700    4.1100    1.9400
dUrel = 0.05;
dU = dUrel*U
dU = 1×5
    1.4300    0.6700    0.3835    0.2055    0.0970
x = [5 10 15 20 25]
x = 1×5
     5    10    15    20    25
dx = 0.2*ones(1,numel(x))
dx = 1×5
    0.2000    0.2000    0.2000    0.2000    0.2000

Plot

errorbar(x,U,dU,dU,dx,dx,'o'), grid on

set(gca,'YScale','log')

Gerade

U1 = 34.4e-3
U1 = 0.0344
U2 = 1.7e-3
U2 = 0.0017
lambda = -((log(U2) - log(U1)) / (27e-3 - 3e-3))^(-1)
lambda = 0.0080
lambdaF = -((log(1.2e-3) - log(47.2e-3)) / (27e-3 - 3e-3))^(-1)
lambdaF = 0.0065
lambdaF = (27e-3 - 3e-3) / (log(47.2e-3) - log(1.2e-3))
lambdaF = 0.0065
dLambda = abs(lambda - lambdaF)
dLambda = 0.0014