Question

On the same graph paper, plot the graphs of y = 2x - 1, y = 2x and y = 2x + 1 from x = - 2 to x = 4. Are the graphs (lines) drawn parallel to each other?

Answer 1

First, prepare a table as follows:

X	-1	0	1
Y = 2x - 1	-3	-1	1
Y = 2x	-2	0	2
Y = 2x + 1	-1	1	3

Now the graph can be drawn as follows:

The lines are parallel to each other.