Sara and two roommates equally share the rent on their apartment. the rent is r dollars. which expression shows sara's share of the rent? a. r + 3 b. r - 3 c. r × 3 d. r ÷ 3

Suppose you are analyzing the relationship between time and distance given in a table,and there are 4 values for each quantity.you divide distance 2 minus distance 1 by time 2 minus time 1.you then divide distance 4 minus distance 3 by time 4 minus time 3 and get a different answer.what can you say about the relationship?