Question

the unruly queens chess club is hosting a tournament, and each club member is bringing something to eat or drink. valentina decides to bring oatmeal raisin cookies from her favorite bakery. this table shows the relationship between the number of oatmeal raisin cookies valentina buys, x, and their total cost (in dollars), y. according to the values in the table, do x and y have a proportional relationship? what is the constant of proportionality? write your answer as a whole number or decimal. dollars per cookie

Explanation:

Step1: Check proportionality

For a proportional relationship, the ratio $\frac{y}{x}$ should be constant.
For the first pair: $\frac{24}{8}=3$
For the second pair: $\frac{72}{24}=3$
For the third pair: $\frac{81}{27}=3$
For the fourth pair: $\frac{123}{41}=3$

Step2: Find cost per cookie

Since the ratio $\frac{y}{x}$ is constant ($3$), the constant of proportionality is $3$.

Answer:

3