MATLAB: For loops with subplots and a function with changing constants

Question

How would I go about using for loops to create subplots of a function while also changing the value of a constant for each subplot?

I'm going to simplify my equations in the example.

Say I want to create 3 subplots of the function y=a*x. The values of a are 2, 4, and 6. In subplot 1 I want to plot y=2x, in subplot 2 I want to plot y=4x, and in subplot 3 I want to plot y=6x. The values of x are 1:10.

I tried the following:

x = [0:1:10];
for i=1:3
    subplot(1,3,i)
    for a=[2 4 6];
        y=a*x;
        plot(x,y)
    end  
end

But that just gave me 3 identical plots for y=6x.

Answer 1

x = [0:1:10];
a = [2 4 6] ;
for i=1:3
    subplot(1,3,i)
    y=a(i)*x ;
    plot(x,y)
end