Ordered pairs for the graph y = x + 3

x	-2	-1	0	1	2
y = x + 3	1	2	3	4	5
Ordered pairs	(-2,1)	(-1,2)	(0,3)	(1,4)	(2,5)

Ordered pairs for the graph y = 2x + 3

x	-2	-1	0	1	2
y = 2x + 3	-1	1	3	5	7
Ordered pairs	(-2,-1)	(-1,1)	(0,3)	(1,5)	(2,7)

Ordered pairs for the graph y = -x + 3

x	-2	-1	0	1	2
y = -x + 3	5	4	3	2	1
Ordered pairs	(-2,5)	(-1,4)	(0,3)	(1,2)	(2,1)

Ordered pairs for the graph y = -2x + 3

x	-2	-1	0	1	2
y = -2x + 3	7	5	3	1	-1
Ordered pairs	(-2,7)	(-1,5)	(0,3)	(1,1)	(2,-1)

Observing above graphs:

1. All these lines slopes are different.
2. All these lines y-intercept is equal and y-intercept is 3.
3. Each straight line intersects Y-axis at (0,3).
4. y-intercept of verys line is 3.
5. All these straight lines are concurrent at the point (0.3).