Respuesta :

Slope=Δy/Δx=(y2-y1)/(x2-x1)

The points are (7,-4) and (7,0)

So slope= [ 0 -( -4 ) ] / [ 7 -7 ] = 4/0 =undefined

We know this is the vertical line of x=7 and vertical lines have undefined (or infinite) slope