The table shows several points on the graph of a linear function. Work in order, to see connections between the slope formula, distance formula, midpoint formula, and linear functions.

x..........................y
0........................-6
1........................-3
2.........................0
3........................ 3
4.........................6
5........................ 9
6.......................12

Fill in each blank, basing the answers on observations in Exercises 86–89: If points A, B, and C lie on a line in that order, then the distance between A and B added to the distance between and is equal to the distance between and.