Question

For the pair of linear equations given below, draw graphs and then state, whether the lines drawn are parallel or perpendicular to each other.
y = x - 3
y = - x + 5

Answer 1

To draw the graph of y = x - 3 and y = - x + 5 follows the steps:

First, prepare a table as below:

X	- 1	0	1
Y = x - 3	- 4	-3	- 2
Y = - x + 5	6	5	4

Now sketch the graph as shown:

From the graph it can verify that the lines are perpendicular.