Question 26550
You only need two coordinates to graph a linear equation because the graph is a straight line.


y=2x+5
Let x=0
y=2(0)+5=5
So, when x=0, y=5


y=2x+5
Let y=0
0=2x+5
-5=2x
-5/2=x
So, when y=0, x=-5/2=-2.5


You now have your two coordinates (0,5) and (-2.5,0).  Plot the two points on a graph, draw a line through them, and you have your graph.