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 makes (y) decrease by (6) per step and has (y(5)=42)?

Answer and explanation

Correct answer: \(y=72-6x\)

A decrease of 6 per step means that the coefficient of x must be \(-6\). Let \(y=a-6x\). Using \(y(5)=42\), we get \(a-6(5)=42\), so \(a=72\). Hence, \(y=72-6x\) is correct. Option A has the correct slope, but it gives \(y(5)=12\). Exam tip: first check the slope for growth or decay, then substitute the given point to verify the constant term.

Related tags

Linear EquationsLinear DecaySlopeSubstitutionPolynomialsLinear Growth And DecayIntroduction To PolynomialsMathematics

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.