Answer:
Step-by-step explanation:
For two lines to be perpendicular to each other the product of their slopes must be -1.
First we need the slope of the reference line. Since
y=mx+b, where m is the slope and the line we are given is
y=2x-4
So we know the slope is 2. So our perpendicular will satisfy
m1(m2)=-1
2m=-1
m= -1/2
So now our line is
y=-x/2+b, using point (0,-7)
-7=-0/2+b
-7=b, now we have the complete line
y=-x/2-7
(Or more neatly)
y=(-x-14)/2
