Determine if Perpendicular y=x+7 and y=-x+2

$y = x + 7$ and $y = - x + 2$

Use the slope-intercept form to find the slope and y-intercept.

The slope-intercept form is $y = m x + b$ , where $m$ is the slope and $b$ is the y-intercept.

$y = m x + b$

Find the values of $m$ and $b$ using the form $y = m x + b$ .

$m_{1} = 1$

$b = 7$

$m_{1} = 1$

$b = 7$

Use the slope-intercept form to find the slope and y-intercept.

The slope-intercept form is $y = m x + b$ , where $m$ is the slope and $b$ is the y-intercept.

$y = m x + b$

Find the values of $m$ and $b$ using the form $y = m x + b$ .

$m_{2} = - 1$

$b = 2$

$m_{2} = - 1$

$b = 2$

Compare the slopes $m$ of the two equations.

$m_{1} = 1, m_{2} = - 1$

Compare the decimal form of one slope with the negative reciprocal of the other slope. If they are equal, then the lines are perpendicular. If the they are not equal, then the lines are not perpendicular.

$m_{1} = 1, m_{2} = 1$

The equations are perpendicular because the slopes of the two lines are negative reciprocals.

Perpendicular

Determine if Perpendicular y=x+7 and y=-x+2

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