Update

Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है

Subjects
0 reads0 ratings0 helpful

Which option is non-constant and represents linear growth of y with x?

Answer and explanation

Correct answer: y = 18 + 2x

A linear rule has the form y = a + bx, where b is the slope or constant rate of change. For y to show growth as x increases, b must be positive; for the rule to be non-constant, b must also be nonzero. Option C has y = 18 + 2x, so its slope is 2. Every increase of 1 in x raises y by 2, which demonstrates positive linear growth. Option A is constant because its slope is 0. Option B simplifies to y = 18 and is also constant. Option D has slope −2, so it represents linear decrease rather than growth. Hence option C is the unique correct answer, and the intercept 18 only gives the starting value; the sign of the coefficient of x determines growth or decline.

Related tags

Linear GrowthSlopeConstant FunctionClass9Linear Growth And DecayIntroduction To PolynomialsMathematicsClass 9 Mcq

Was this question useful?

No ratings yetWrite a review / Rate this question

Student Reviews

No published reviews yet.

Add Muft Shiksha to your Home Screen

In Safari, tap Share, then Add to Home Screen.