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Question:

Draw the graph of each of the following linear equations in two variables: (i) x + y = 4 (ii) x - y = 2 (iii) y = 3x (iv) 3 = 2x + y

Solution:

(i) x + y = 4
x | 0 | 1 | 4
y | 4 | 3 | 0
(ii) x - y = 2
x | 2 | 3 | 0
y | 0 | 1 | -2
(iii) y = 3x
x | 0 | 1 | 2
y | 0 | 3 | 6
(iv) 2x + y = 3
x | 0 | 1 | 3/2
y | 3 | 1 | 0