Question

How many magazine subscriptions did Kayla sell per day?

Answer 1

2 subscriptions per day

Day 6 = 15 subscriptions

Day 12 = 27 subscriptions

Day 18 = 39 subscriptions

So, every 6 days she sells 12 more subscriptions.

Then divide 12 by 6 and you get 2.

Selling 12 subscriptions every 6 days is averaging 2 per day.