Basic Math Examples

$(3, - 3)$ , $(3, - 4)$

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.

$m = \frac{- 4 - (- 3)}{3 - (3)}$

Step 4

Simplify.

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Step 4.1

Multiply $- 1$ by $3$ .

$\frac{- 4 - (- 3)}{3 - 3}$

Step 4.2

Subtract $3$ from $3$ .

$\frac{- 4 - (- 3)}{0}$

Step 4.3

The expression contains a division by $0$ . The expression is undefined.

Undefined

Step 5

The slope of a perpendicular line is the negative reciprocal of the slope of the line that passes through the two given points.

$m_{perpendicular} = - \frac{1}{m}$

Step 6

The slope of a line perpendicular to a vertical line is zero.

$m_{perpendicular} = 0$

Step 7