Please this is a very important test

It is Y = -1/2x, the first one. Hope this helps! ^_^

Step-by-step explanation:

The negative on that fraction goes to the one. Start at (0, 0), then go down one and two to the right. This gives you the line shown on the graph.

y=−9/2x+10

step-by-step explanation:

let's solve for y.

0−9x−2y=−20

step 1: add 9x to both sides.

−9x−2y+9x=−20+9x

−2y=9x−20

step 2: divide both sides by -2.

−2y

−2

=

9x−20

−2

y=

−9

2

x+10