Find the Slope (-1,2) , (1,-1)

$(- 1, 2)$ , $(1, - 1)$

Step 1

Slope is equal to the change in $y$ over the change in $x$ , or rise over run.

$m = \frac{change in y}{change in x}$

Step 2

The change in $x$ is equal to the difference in x-coordinates (also called run), and the change in $y$ is equal to the difference in y-coordinates (also called rise).

$m = \frac{y_{2} - y_{1}}{x_{2} - x_{1}}$

Step 3

Substitute in the values of $x$ and $y$ into the equation to find the slope.

$m = \frac{- 1 - (2)}{1 - (- 1)}$

Step 4

Simplify.

Simplify the numerator.

Multiply $- 1$ by $2$ .

$m = \frac{- 1 - 2}{1 - (- 1)}$

Subtract $2$ from $- 1$ .

$m = \frac{- 3}{1 - (- 1)}$

Simplify the denominator.

Multiply $- 1$ by $- 1$ .

$m = \frac{- 3}{1 + 1}$

Add $1$ and $1$ .

$m = \frac{- 3}{2}$

Move the negative in front of the fraction.

$m = - \frac{3}{2}$

Step 5

Find the Slope (-1,2) , (1,-1)

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