Answer :

3x – 4y + 3 = 0

Let x = 1

(3×1) – 4y + 3 = 0

3 + 3 = 4y

6 = 4y

y = 1.5

Let x = 3

3x – 4y + 3 = 0

3×3 – 4y + 3 = 0

9 – 4y = – 3

9 + 3 = 4y

y = 3

Let y = 0

3x – 4 × 0 = – 3

3x = – 3

x = – 1

3x + 4y – 21 = 0

Let x = 3

3x + 4y – 21 = 0

3×3 + 4y = 21

9 + 4y = 21

4y = 21 – 9

4y = 12

y = 3

Let y = 0

3x + 4×0 = 21

3x + 0 = 21

3x = 21

x = 7

Let x = 1

3×1 + 4y – 21 = 0

3 + 4y – 21 = 0

4y = 18

y = 4.5

Coordinates of ∆ CBE = C (3, 3) B ( – 1, 0) E (7, 0)

Therefore, area of the triangle is 12 square units.

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