Question

the graph of which of the following will be perpendicular to the graph of y= 2x - 4
A) 2x + y = 4
B) 4x - 2y = 4
C) y= -2x + 8
D) 2x + 4y = 1

Answer 1

we need a slope of -1/2

2x + 4y = 1
4y = -2x + 1
y = -2/4x + 1/4
y = -1/2x + 1/4...slope of -1/2...so answer is D

Answer 2

we need a slope of -1/2 so the write answer is d