Just do 12 times 2 d=24 because 24 divided by 12 =2
the slope goes by several names
• average rate of change
• rate of change
• deltaY over deltaX
• Δy over Δx
• rise over run
• gradient
• constant of proportionality
however, is the same cat wearing different costumes.

2p=pe^0.067t
2=e^0.067t
t=(log(2)/log(e))/0.067
T==10.3 years