Question

Find the slopes of the lines $x+y=0$ and $x-y=0$.

Answer 1

$y=mx+c$ where m is the slope

Here, $x+y=0\Rightarrow y=-x\Rightarrow y=(-1)x$

Therefore, slope i.e. $m=-1$

Again, $x-y=0\Rightarrow y=x$

slope i.e. $m=1$