Question

Y-intercept and slope pls help

Answer 1

Check the picture below.

to get the slope of any straight line, we simply need two points off of it, let's use those two in the picture below

`(\stackrel{x_1}{15}~,~\stackrel{y_1}{200})\qquad (\stackrel{x_2}{40}~,~\stackrel{y_2}{125}) ~\hfill \stackrel{slope}{m}\implies \cfrac{\stackrel{\textit{\large rise}} {\stackrel{y_2}{125}-\stackrel{y1}{200}}}{\underset{\textit{\large run}} {\underset{x_2}{40}-\underset{x_1}{15}}} \implies \cfrac{ -75 }{ 25 } \implies - 3`