(12 x 2) - 5 because twice as many means to multiply by 2. fewer means to subtract.
Answer:
m= rise/run = y2-y1/x2-x1
Given a sequence; a₁,a₂,a₃...,an,
The common difference is d= a₂-a₁=a₃-a₂=a₄-a₃....
In this case:
a₁=1.05
a₂=1.1
d=a₂-a₁=(1.1)-(1.05)=0.05
Answer: The common difference is 0.05.
