How do I make this ellipse?

16*x^2 + 4*y^2 = 1;

[John D'Errico]

Please stop posting your homework problems. This is the 4th one you have now posted, all with no effort made, one after another, all the same, and all clearly homework.

Answer 1

[Matt J]

fimplicit(@(x,y)16*x.^2 + 4*y.^2 -1); axis equal

Answer 2

[Voss]

t = 0:0.01:2*pi;
x = 0.25*cos(t);
y = 0.5*sin(t);
figure();
plot(x,y);
axis square

Reference