Direct And Inverse Variation
Muhtasari
Some quantities rise and fall together: drive twice as long at a steady speed and you cover twice the distance. Others move in opposite directions: double the number of workers and a job takes half the time. These two patterns, direct and inverse variation, capture an enormous range of everyday relationships in a single, simple equation.
In this lesson you will write direct and inverse variation algebraically, find the constant of variation from given information, and use the resulting equation to find unknown quantities. The key is the constant: once you have it, the whole relationship is fixed.
Malengo
- Express direct and inverse variation algebraically and use it to find unknown quantities.
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Hongera kwa kukamilisha somo la Direct And Inverse Variation. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- If y varies directly as x and y = 12 when x = 3, what is the constant of variation? A. 3 B. 4 C. 9 D. 36 Answer: B
- If y = 4x, what is y when x = 5? A. 9 B. 16 C. 20 D. 45 Answer: C
- If y varies inversely as x and y = 6 when x = 2, the constant is: A. 3 B. 8 C. 12 D. 4 Answer: C
- If y = 12/x, what is y when x = 4? A. 3 B. 4 C. 8 D. 48 Answer: A
- Which relationship is inverse variation? A. y = kx B. y = k + x C. y = k/x D. y = x/k Answer: C
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Vitabu Vinavyopendekezwa
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Sehemu ya kitabu
Use Direct and Inverse Variation
Solve direct variation problems
"Elementary Algebra: Use Direct and Inverse Variation" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/elementary-algebra/pages/8-9-use-direct-and-inverse-variation. Access for free at https://openstax.org/books/elementary-algebra/pages/1-introduction
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