Answer :
ANSWER= x+7=0
If line is vertical then the slope/m=1/0= undefined
But we know that it’s x value will always remain constant
(-7,3) tells us that the x value is -7
x=-7
So
x+7=0
If line is vertical then the slope/m=1/0= undefined
But we know that it’s x value will always remain constant
(-7,3) tells us that the x value is -7
x=-7
So
x+7=0