How to graph multiple equations on a graph?

Question

Just curious about how to do this homework.

My problem was:

Graph the Equation:

y=2x+4

y=-2x+4

y=2x-4

y=-2x-4. On a single axis

Ive worked out all the equations, And my question is to you, Do i draw all the lines for the equations on One single graph, or individual graphs?

Thanks alot who ever answers!

Answer 1

One single graph, I think.

Because Some equations intersect, to find the breaking point or something O_o But, its probably to show the increase, or rise and change

Answer 2

On one graph because it says on an single axis. I'm assuming that they want you to see the difference that a negative number can make on a line.