the slope goes by several names
⢠average rate of change
⢠rate of change
⢠deltaY over deltaX
⢠Îy over Îx
⢠rise over run
⢠gradient
⢠constant of proportionality
however, is the same cat wearing different costumes.
[tex](\stackrel{x_1}{2009}~,~\stackrel{y_1}{26500})\qquad (\stackrel{x_2}{2012}~,~\stackrel{y_2}{20500}) \\\\\\ \stackrel{slope}{m}\implies \cfrac{\stackrel{rise} {\stackrel{y_2}{20500}-\stackrel{y1}{26500}}}{\underset{run} {\underset{x_2}{2012}-\underset{x_1}{2009}}}\implies \cfrac{-6000}{3}\implies -2000[/tex]