Hello!
The slope is
![(rise)/(run)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/y74n23kkb6cvuej852loqii2syxq3dl08k.png)
. One way we could do this is find two points on the line and form a right triangle to connect the two. We then divide the rise of this triangle by the run.
We can see the points (-3,-2) and (0,-1). As you can see, our rise is 1, and the run is 3. If we divide our rise by run, we get the
slope of 1/3.
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The work we did above can be represented in the following formula.
![( y_(2) - y_(1) )/( x_(2)- x_(1) )](https://img.qammunity.org/2019/formulas/mathematics/middle-school/6xgb3oloywax3x3rinkkpj87bcypchihpy.png)
The ones and twos just represent a certain ordered pair. We will have (0,-1) be (
![x_(1) , y_(1)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/c9do2poio8wpp6yjh40cbnjdbqnsamo9jf.png)
) and (-3,-2) be (
![x_(2) , y_(2)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/fvps1bjwcx0cc5ij4gqi4duisz37z8m6a0.png)
). Now we plug our numbers into the formula. Note that the ones and twos can be swapped and the slope will be the same.
![(-2+1)/(-3-0) = (-1)/(-3) = (1)/(3)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/ug82bw8ruo5o9z9fptdpaagoufl34osxdr.png)
This proves that
our slope is 1/3.
I hope this helps!