Plot multiple graph using 'hold on' and loop function

Hi everyone. I am trying to plot multiple graph in Matlab. The equation is power law y=ax^n. The value of "n" varies from 0.1 to 1 and value of "a" also varies and accordingly y is calculated by varying x. The code i have written is below. Please suggest any solutions.

n=0.1:0.1:1;
x=0.1:0.1:3;
while (n<1.1)
a=1/3^n;
y=a*x.^n;
plot (x,y)
hold on
n=n+0.1;
x=x+o.1;
end

Answer 1

[Evgeny Pr]

You want to do this?

n = 0.1:0.1:1;
x = 0.1:0.1:3;

for ni = n
    a = 1 / 3^ni;
    y = a * x.^ni;
    plot (x, y)
    hold on
end

Answer 2

[José-Luis]

n=0.1:0.1:1;
x=0.1:0.1:3;
[X N] = ndgrid(x,n);
A = (1/3).^N;
Y = A.*X.^N;
plot(X,Y);