Linear equations in two variables

Draw a graph
1.x+y=9
2.2x+y=6
3.x-y=4
4.y=4x
5.2x-y=4
6.3x+y=4
7.6x-5y=1
8.3x=y+4
9.x=5y
10.x-5y=7

type in your equations at

wolframalpha.com

and it will show the graphs.

Rather than just dump a list of similar problems, try posting one. Then, when that is explained, try your hand at others like it.

No one likes to be handed a list with "gimme the answers".