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Mathematics

Draw the graphs of the following linear equation.

2x + 3y = 6

Also find slope and y-intercept of this line.

Coordinate Geometry

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Answer

Given,

⇒ 2x + 3y = 6

⇒ 3y = 6 - 2x

⇒ y = 632x3\dfrac{6}{3} - \dfrac{2x}{3}

⇒ y = 2x3+2-\dfrac{2x}{3} + 2 ………..(1)

When x = 0, y=22x3=22×03y = 2 - \dfrac{2x}{3} = 2 - \dfrac{2 \times 0}{3} = 2 - 0 = 2,

x = 3, y = 22×332 - \dfrac{2 \times 3}{3} = 2 - 2 = 0,

x = 6, y = 22×63=21232 - \dfrac{2 \times 6}{3} = 2 - \dfrac{12}{3} = 2 - 4 = -2.

x036
y20-2

Steps of construction :

  1. Plot the points (0, 2), (3, 0) and (6, -2) on graph.

  2. Join the points.

Draw the graphs of the following linear equation. 2x + 3y = 6. 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, we get :

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

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

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