Dear Masd
for Drawing a curved line u just need change your equation by square. i.e U=Un(Rx/R).^2;
Un=120%tension[V]
R=500%potentiometer[kOhm]
I=10%potentiometer[mm]
x=0:1:10;%dunno what this line is
Rx=(x/I)*R
U=Un*(Rx/R).^2;
plot(x,U)
xlabel('potentiometer[mm]')
ylabel('tension[V]')
x=0:1:10;%dunno what this line is;
This equation indicates that the value of x is changing from 0 to 10 at a step of 1;i.e [0,1,2,3.....,10].
i hope it will help you.
Best Of Luck.....
