Question

Find the common difference of each of the above lists. Think when is it positive?

Answer 1

Common difference d = a₂ – a₁ 

a) 148 – 147 = 1 

b) -3.0 – (-3.1) = 0.1 

c) 900 – 950 = -50 

d) 250 – 200 = 50

e) 100 – 50 = 50 

Common difference is positive when a₂ > a₁