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

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रेखा \(y=-\frac{1}{2}x+3\) की ढाल क्या है?

What is the slope of the line \(y=-\frac{1}{2}x+3\)?

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Correct Answer

A. \(-\frac{1}{2}\)

Explanation

Simple Explanation

रेखा के ढाल-अवरोध रूप \(y=mx+c\) में \(x\) का गुणांक \(m\) ढाल को दर्शाता है। यहाँ \(m=-\frac{1}{2}\), इसलिए सही उत्तर \(-\frac{1}{2}\) है। \(3\) y-अवरोध है, ढाल नहीं; जबकि धनात्मक \(\frac{1}{2}\) चिह्न को गलत पढ़ने से मिलेगा। परीक्षा-युक्ति: समीकरण को \(y=mx+c\) से मिलाकर सीधे \(x\) का गुणांक पहचानें। / In the slope-intercept form \(y=mx+c\), the coefficient of \(x\), namely \(m\), is the slope. Here, \(m=-\frac{1}{2}\), so the correct answer is \(-\frac{1}{2}\). The number \(3\) is the y-intercept, not the slope, while \(\frac{1}{2}\) results from overlooking the negative sign. Exam tip: Compare the equation directly with \(y=mx+c\) and identify the coefficient of \(x\).

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रेखा \\(4x-2y=6\\) की ढाल क्या है?

What is the slope of the line \\(4x-2y=6\\)?

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Correct Answer

A. 2

Explanation

Simple Explanation

समीकरण \\(4x-2y=6\\) को ढाल-अवरोध रूप में लिखने पर \\(y=2x-3\\) प्राप्त होता है। \\(y=mx+c\\) में \\(x\\) का गुणांक ढाल \\(m\\) होता है, इसलिए ढाल \\(2\\) है। विकल्प \\(-2\\) में चिह्न गलत है। परीक्षा-युक्ति: पहले रेखा को \\(y=mx+c\\) के रूप में बदलें। / Rearranging \\(4x-2y=6\\) gives \\(y=2x-3\\). In the slope-intercept form \\(y=mx+c\\), the coefficient of \\(x\\) is the slope, so the slope is \\(2\\). The distractor \\(-2\\) has the wrong sign. Exam tip: rewrite a linear equation in the form \\(y=mx+c\\) before identifying the slope.

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