find the 2 equations of lines 1 and 2 as shown on the graph(the picture).. the 4 numbers on the graph are 5(top-most number on the y-axis), -5 (left number on the x-axis), 5 (right number on the x-axis), -5(bottom number on the y-axis).. I'm just saying this because the numbers on the picture are quite unclear to the eyes...

How are you supposed to tell what they are without any information? i.e. coordinate points, slope, etc.

There.. I deleted the old picture.. and uploaded a new pic with a more complete data...
How are you supposed to tell what they are without any information?. i.e. coordinate points, slope, etc.