Answer:
1 item = 48
2 items = 96
3 items = 144
4 items = 192
Step-by-step explanation:
Because it takes him an additional 48 seconds to purchase each item we can write the equation 48x to represent this situation.
Plug in the number of items into x to solve.
1 x 48 = 48
2 x 48 = 96
3 x 48 = 144
4 x 48 = 192