Question

Which of the following Lines has a slope of -1/2

1. x-2y=0
2. -x+2y=0
3. x+2y=0

Answer 1

If you solve all the equations for y, i.e. you write write all the lines in the form

`y=mx`

then
`m` is the slope. So, you have

`x-2y=0 \iff y=(1)/(2)x`

`-x+2y=0 \iff y=(1)/(2)x`

`x+2y=0 \iff y=-(1)/(2)x`