Question

Determine whether the graphs of y=-7x-4 and -y=7x+4 are parallel, perpendicular, coincident or none of these

Answer 1

The graphs of y=-7x-4 and -y=7x+4 are coincident.

Answer 2

we are given

`y=-7x-4`

`-y=7x+4`

we can multiply -1 on both sides of second equation

`-1*-y=-1(7x+4)`

`y=-7x-4`

we can see that

both equations becomes same

so, they are coincident............Answer