Question

Which equation represents a line that is perpendicular to the line represented by 2x - y = 7?

Answer 1

the answer is number 1 )

Explanation:

we know that

if two lines are perpendicular

so

the slopes

m1*m2=-1

we have

2x-y=7-------> y=2x-7------------> slope m1=2

find slope m2

m2=-1/m1------> m2=-1/2

the slope m of the perpendicular line must to be -1/2

so

the answer is

y = -1/2x + 6