Answer:
$5
Explanation:
Given in the question a graph,
We have clearly see that graph can be divided into 3 parts.
Part 1
we can see that $5 will be charged for the package which weight is 3 Ibs or less than 3 Ibs.
Part 2
we can see that $10 will be charged for the package which weight 6 Ibs or than less 6 but greater than 3 Ibs
Part 3
We can see that after 6kg the cost is linear to the weight of the package.