Answer:
s = 0.06 c
Explanation:
The sales tax rate is 6%, which means that the amount of sales tax (s) is 6% of the cost of an item (c).
Therefore, the equation that represents the relationship between c and s is:
s = 0.06 c
This equation expresses that the amount of sales tax (s) is equal to 6% (0.06) of the cost of the item (c).