7 − 4 = 10 − 7 = 13 − 10 = 3

m = 3

t(n) = 3n − t(0)

t(0) = 4 − 3 = 1

t(n) = 3n + 1

m = 5

t(n) = 5n − 2

m = −5

t(n) = −5n + 29

9.5 − 7 = 12 − 9.5 = 2.5

m = 2.5

t(0) = 7 − 2.5 = 4.5

t(n) = 2.5n + 4.5