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We should find the slope and the $y$-intercept and for this we have a special form, the slope-intercept form. $y=mx+b, $ In the above equation, $m$ represents the slope and $b$ the $y-$intercept of the line. Let's rewrite our equation a little bit so that it more closely resembles this form. It will make it easier to identify the slope and intercept. $y=21 ⇔y=0x+21 $ We see above that the slope is $0$ and the $y-$intercept is $21 .$

b

$m=x_{2}−x_{1}y_{2}−y_{1} $

$m=-2−(-6)2−2 $

Evaluate right-hand side

$m=0$