Give one pair of possible whole number dimensions for the base volume 350 and height of 3

Which function is represented by the graph

Rachel reads 1/5 of the pages of a book plus 12 pages on the first day. on the second day, she reads 1/4 of the remaining pages plus 15 pages. on the third day, she reads 1/3 of the remaining pages plus 18 pages. on the fourth day, she reads the remaining 70 pages. how many total pages are in the book?

Brent wants to know what is 5 x 1/2