Unit 3 Review
Flashcard
•
Mathematics
•
7th - 10th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is percent error?
Back
Percent error is a measure of how inaccurate a measurement is, expressed as a percentage of the actual value. It is calculated using the formula: Percent Error = |(Measured Value - Actual Value)| / Actual Value * 100%.
2.
FLASHCARD QUESTION
Front
How do you calculate percent error if the measured length is 12 cm and the actual length is 14.25 cm?
Back
Percent Error = |(12 - 14.25)| / 14.25 * 100% = 15.79%.
3.
FLASHCARD QUESTION
Front
What is the equation for a direct variation?
Back
The equation for a direct variation is of the form y = kx, where k is a constant.
4.
FLASHCARD QUESTION
Front
What does it mean if a relationship is proportional?
Back
A proportional relationship means that two quantities maintain a constant ratio, and can be represented by a straight line through the origin on a graph.
5.
FLASHCARD QUESTION
Front
What is the difference between direct variation and non-proportional relationships?
Back
Direct variation has a constant ratio (y = kx), while non-proportional relationships do not maintain a constant ratio and may not pass through the origin.
6.
FLASHCARD QUESTION
Front
Is the equation y = 8x a direct variation?
Back
Yes, y = 8x is a direct variation because it can be expressed in the form y = kx, where k = 8.
7.
FLASHCARD QUESTION
Front
What is an example of a non-proportional relationship?
Back
An example of a non-proportional relationship is y = 2x + 3, which does not pass through the origin.
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