Answer:
-8/5
Step-by-step explanation:
[tex]y \infty x \\ y = kx \\ when \: y \: = - 8...x = 20 \\ so \: - 8 = 20k \\ k = \frac{ - 8}{20} = \frac{ - 2}{5} \\ [/tex]
To find y when x = - 4,
[tex]y = ( \frac{ - 2}{5} ) ( - 4) \\ y = \frac{ - 8}{5} [/tex]
