plot equation with 3 variables on matlab

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MatLab

good evening , i'm working on some equation on matlab and i need to plot them in figures , i used this code

x=[0:9];
y=[0:9];
for w=1:10
    n=sqrt(x(1,w))+sqrt(y(1,w));
    z(1,w)=power(n,.5);
end
plot(x,z);

this one will plot the relation between z and x only .
how could i plot y too in the same equation ?
thank you