To write the equation for the total cost \( y \) in terms of the number of kites purchased \( x \), we can follow the pricing structure you've provided.
The cost for the kites is $6 per kite, so if the customer buys \( x \) kites, the cost for the kites alone would be \( 6x \).
Additionally, there is a flat shipping rate of $10.
Thus, the total cost \( y \) can be expressed as:
\[ y = 6x + 10 \]
Here, \( y \) represents the total cost, \( x \) is the number of kites purchased, and the equation combines both the variable cost of the kites and the fixed shipping cost.