Class 11 Mathematics - Straight Lines - Slope of a line and angle between two lines Expert Quiz

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रेखा \(3x+2y=12\) की ढाल क्या है?

What is the slope of the line \(3x+2y=12\)?

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Correct Answer

A. \(-\frac{3}{2}\)

Explanation

Simple Explanation

समीकरण को ढाल-अवरोध रूप में लिखने पर \(2y=-3x+12\), अतः \(y=-\frac{3}{2}x+6\) प्राप्त होता है। \(y=mx+c\) में \(x\) का गुणांक \(m\) ढाल होता है, इसलिए ढाल \(-\frac{3}{2}\) है। विकल्प B में ऋणात्मक चिह्न छूट गया है। परीक्षा-युक्ति: सामान्य रूप \(ax+by+c=0\) में ढाल \(-\frac{a}{b}\) होती है। / Rearranging the equation gives \(2y=-3x+12\), so \(y=-\frac{3}{2}x+6\). In the slope-intercept form \(y=mx+c\), the coefficient of \(x\) is the slope; hence the slope is \(-\frac{3}{2}\). Option B has the wrong sign. Exam tip: For a line \(ax+by+c=0\), its slope is \(-\frac{a}{b}\).

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