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

If R(x) = 140 + mx and R(14) - R(7) = 126, what is R(0)?

Answer and explanation

Correct answer: 140

The governing concept is evaluation of a linear function in the form R(x) = b + mx, where b is the value at x = 0 and m is the rate of change. First use the given difference: R(14) - R(7) = (140 + 14m) - (140 + 7m) = 7m. Since this equals 126, 7m = 126 and m = 18. However, the question asks for R(0), not for the slope m. Substituting x = 0 into the original function gives R(0) = 140 + m·0 = 140. Therefore option C is correct. Option A is the value of m, option B is the stated difference, and option D incorrectly combines unrelated quantities instead of evaluating the function at zero.

Related tags

Linear FunctionInitial ValueRateLinear 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.