The cost per baseball is $ 0.25
Solution:
Given that,
A sporting complex charges $6 to use its facility
The expression that models the total cost to hit b baseballs in the batting charges is:
Total cost = 0.25b + 6
From given,
6 represents the charge to use the facility
"b" is the number of baseballs
0.25 represents the cost per baseball
Thus, cost per baseball is $ 0.25