Inverse and Direct variations
Flashcard
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
Wayground Content
FREE Resource
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15 questions
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1.
FLASHCARD QUESTION
Front
What is direct variation?
Back
Direct variation is a relationship between two variables where one variable is a constant multiple of the other. It can be expressed as y = kx, where k is the constant of variation.
2.
FLASHCARD QUESTION
Front
What is inverse variation?
Back
Inverse variation is a relationship between two variables where the product of the two variables is a constant. It can be expressed as y = k/x, where k is the constant of variation.
3.
FLASHCARD QUESTION
Front
If y varies directly with x and y = 39 when x = 3, what is the constant of variation (k)?
Back
k = y/x = 39/3 = 13.
4.
FLASHCARD QUESTION
Front
If y varies directly with x and k = 13, what is y when x = 2?
Back
y = kx = 13 * 2 = 26.
5.
FLASHCARD QUESTION
Front
In a direct variation, if x increases, what happens to y?
Back
In direct variation, if x increases, y also increases.
6.
FLASHCARD QUESTION
Front
In an inverse variation, if x increases, what happens to y?
Back
In inverse variation, if x increases, y decreases.
7.
FLASHCARD QUESTION
Front
What type of variation is represented by the relationship between the length of time you charge your cell phone and the battery power?
Back
Direct variation.
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