# How do you write an equation of a line that goes through (-6,-7) with m= -1?

$y - {y}_{p} = m \left(x - {x}_{p}\right)$,
$y + 7 = - 1 \left(x + 6\right) \Rightarrow y = - x - 6 - 7 \Rightarrow y = - x - 13$.