Direct Variation

Flashcard
•
Mathematics
•
8th Grade
•
Hard
Standards-aligned
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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 a non-zero constant.
2.
FLASHCARD QUESTION
Front
What does it mean if a table represents Direct Variation?
Back
A table represents Direct Variation if the ratio of the two variables remains constant for all pairs of values.
3.
FLASHCARD QUESTION
Front
How can you identify Direct Variation from a graph?
Back
A graph represents Direct Variation if it is a straight line that passes through the origin (0,0).
4.
FLASHCARD QUESTION
Front
What is the unit rate?
Back
The unit rate is the ratio of two measurements in which the second measurement is 1. It is often used to compare prices or speeds.
Tags
CCSS.6.RP.A.1
CCSS.6.RP.A.2
5.
FLASHCARD QUESTION
Front
If y varies directly with x, and y = 12 when x = 3, what is the constant of variation (k)?
Back
k = 4, because y = kx implies 12 = k(3), so k = 12/3 = 4.
6.
FLASHCARD QUESTION
Front
Does the equation y = 5x + 2 represent Direct Variation?
Back
No, because it does not pass through the origin; it has a y-intercept of 2.
7.
FLASHCARD QUESTION
Front
If the cost of 4 pounds of apples is $4.80, what is the cost per pound?
Back
$1.20 per pound.
Tags
CCSS.6.RP.A.1
CCSS.6.RP.A.2
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