Question

Draw a graph of each of the following equations: x + y - 3 = 0

Answer 1

x + y - 3 = 0
⇒ y = 3 - x
When x = 2, y = 3  2 = 1
When x = 0, y = 3 - 0 = 3
When x = 6, = 3 - 6 = - 3

x	2	0	6
y	1	3	-3

Plotting the points (2, 1), (0, 3) and (6, -3), we get a line AB as shown in the figure.