Antonia is keeping track of the number of pages she reads. she started the school year having already read 95 pages her book, and she then reads 20 pages each day. the function for her total pages read is f(x) = 20x + 95. what do f(x) and x represent in antonia's situation?
1. f(x) represents the number of days; x represents the total number of pages that antonia has read
2. f(x) represents the total number of pages that antonia has read; x represents the number of days
3. f(x) represents the number of pages antonia reads per day; x represents the number of days
4. f(x) represents the total number of pages that antonia has read; x represents the number of pages she reads per day