Question

which of the following lines has a slope of -1/2?

a)x+2y=0
b)x-2y=0
c)-x+2y=0

Answer 1

In all 3 cases, solve the equation for y.  Example:  3rd equation:  Add x to both sides, obtaining 2y = x.  Divide both sides by 2, obtaining y = (1/2)x.

Answer 2

the answer is A) x + 2y = 0
move the X over : 2y = -x + 0
then divide both sides by 2
y = -1/2x + 0