Answer:
technique to find the coefficient of proportionality: divide the number at the bottom by the number at the top.
coefficient: -12/3 =-4
or make a cross product knowing 3 values:
here we know 3;-12and16: 3*16/-12=-4
x -5 -1/2 0 3 -4 -1/6
y=kx 20 2 0 -12 16 1/4
Explanation: