Question

Find the slope? (-2,-20),(-1,-23),(0,-26),(1,-29)

Answer 1

to get the slope of any straight line, we simply need two points off of it, let's use hmmmm say (-2 , -20) and (1 , -29).

`(\stackrel{x_1}{-2}~,~\stackrel{y_1}{-20})\qquad (\stackrel{x_2}{1}~,~\stackrel{y_2}{-29}) \\\\\\ \stackrel{slope}{m}\implies \cfrac{\stackrel{\textit{\large rise}} {\stackrel{y_2}{-29}-\stackrel{y1}{(-20)}}}{\underset{\textit{\large run}} {\underset{x_2}{1}-\underset{x_1}{(-2)}}} \implies \cfrac{-29 +20}{1 +2} \implies \cfrac{ -9 }{ 3 } \implies -3`