Plotting y = kx

I am trying to reproduce the following graph, which is a plot of some function like: y = kx, with both varying 'k' and 'x'. Can someone help me in this?

[Walter Roberson]

Can you do it parametrically, k = K(t), x = X(t), hence y = K(t).*X(t) ?

[Behnaz Seyedahmadi]

it is simpler than taht, I dont know why I am stuck in it, it is this way:

0<k<1000

0<x<20225

y = k.* x

but I dont know how to match the x and K size?

Answer 1

[Walter Roberson]

N = 150;
kvec = linspace(0, 1000, N);
xvec = linspace(0, 20225, N);
[k, y] = meshgrid(kvec, xvec);
y = k .* x;
nlevels = 50;
contour(k, y, nlevels)

Answer 2

[Sulaymon Eshkabilov]

k=1:999;
x =1:2024;
F = k.* x(:);
N = 25;
contour(k, x, F, N), shg
xlabel('k stifness'), ylael(' ...')