one out of every 9 light bulbs is defective. what constant of proportionality relates defective bulbs to…

Explanation:

Step1: Define Proportionality

The constant of proportionality ( k ) in a proportional relationship ( y = kx ) (where ( y ) is defective bulbs, ( x ) is total bulbs) is the ratio of ( y ) to ( x ).

Step2: Calculate the Ratio

Given 1 defective bulb out of 9 total bulbs, the ratio is ( \frac{\text{defective}}{\text{total}}=\frac{1}{9} ). So ( k = \frac{1}{9} ).

Answer:

(\frac{1}{9})