Here are 4 one-page sets of function tables, WITH ANSWER KEYS. 24 function tables in all, 12 horizontal and 12 vertical. Each of the numbered sheets gets progressively more difficult. The preview file shows the easiest and 2nd most difficult. Great for a tiered lesson, math center, warm-up, or just as a practice worksheet. You will receive the files in both pdf and Microsoft Word form, so you can modify them or use the framework to create more. Thanks for looking, and feel free to check out my other items.