$x$ ve $Y$ rassal de$$i$$kenleri i$$in verilen ortak yo$$unluk fonksiyonuna g$$re $x$ ve Y'nin covaryans'$$n$$ hesaplaymn$$z$.$

$f(x,y)=\{\begin{array}{ccc}\frac{2}{3}(x+2y),& 0x1,& 0y1\\ 0& Dier\text{d}\text{u}\text{r}\text{u}\text{m}\text{l}\text{a}\text{r}& \end{array}$