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Mathematics

Draw the graphs of the following linear equation.

2x - 3y = 4

Also find slope and y-intercept of this line.

Coordinate Geometry

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Answer

Given,

⇒ 2x - 3y = 4

⇒ 3y = 2x - 4

⇒ y = 2x43\dfrac{2x - 4}{3}

⇒ y = 23x43\dfrac{2}{3}x - \dfrac{4}{3} ……..(1)

When x = -1, y = 23×143=2343=63\dfrac{2}{3} \times -1 - \dfrac{4}{3} = -\dfrac{2}{3} - \dfrac{4}{3} = -\dfrac{6}{3} = -2,

x = 2, y = 23×243=4343\dfrac{2}{3} \times 2 - \dfrac{4}{3} = \dfrac{4}{3} - \dfrac{4}{3} = 0,

x = 5, y = 23×543=10343=63\dfrac{2}{3} \times 5 - \dfrac{4}{3} = \dfrac{10}{3} - \dfrac{4}{3} = \dfrac{6}{3} = 2.

x-125
y-202

Steps of construction :

  1. Plot the points (-1, -2), (2, 0) and (5, 2) on graph.

  2. Join the points.

Draw the graphs of the following linear equation. 2x - 3y = 4. Also find slope and y-intercept of this line. Coordinate Geometry, ML Aggarwal Understanding Mathematics Solutions ICSE Class 9.

Comparing equation (1) with y = mx + c.

m = 23\dfrac{2}{3} and c = 43-\dfrac{4}{3}.

Hence, the slope of line = 23\dfrac{2}{3} and y intercept = 43-\dfrac{4}{3}.

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