y = k/x
y = 1/3 x = 8 k = ?
[tex] \frac{1}{3} = \frac{k}{8} [/tex]
[tex]k = ( \frac{1}{3} )(8)[/tex]
[tex]k = \frac{8}{3} [/tex]
y = ? x = -4 k = 8/3
[tex]y = \frac{ \frac{8}{3} }{-4} [/tex]
[tex]y = ( \frac{8}{3}) (- \frac{1}{4} )[/tex]
[tex]y = - \frac{8}{12} [/tex]
[tex]y = - \frac{2}{3} [/tex]