\larger[2]$x$
0
0.5
1
1.5
2
2.5
3
3.5
\larger[2]$y$
0
0.5
1
1.5
2
2.5
3
3.5
0
20
40
60
80
100
120
140
\larger[2]$z(x,y) = \frac{1}{\sigma_x\sigma_y\sqrt{4\pi^2}}\exp\left(- \left(\frac{(x-\mu_x)^2}{2\sigma_x^2} + \frac{(y-\mu_y)^2}{2\sigma_y^2} \right)\right)$