Unit 9 Test
Flashcard
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the difference between association and causation?
Back
Association indicates a relationship between two variables, while causation implies that one variable directly affects the other.
2.
FLASHCARD QUESTION
Front
What is a geometric sequence?
Back
A geometric sequence is a sequence of numbers where each term after the first is found by multiplying the previous term by a fixed, non-zero number called the common ratio.
3.
FLASHCARD QUESTION
Front
How do you find the nth term of a geometric sequence?
Back
The nth term can be found using the formula aₙ = a₁ * r^(n-1), where a₁ is the first term and r is the common ratio.
4.
FLASHCARD QUESTION
Front
What does a correlation coefficient indicate?
Back
The correlation coefficient measures the strength and direction of a linear relationship between two variables, ranging from -1 to 1.
5.
FLASHCARD QUESTION
Front
What does a negative correlation coefficient signify?
Back
A negative correlation coefficient indicates that as one variable increases, the other variable tends to decrease.
6.
FLASHCARD QUESTION
Front
How do you simplify a radical expression?
Back
To simplify a radical expression, factor the number under the radical into its prime factors and look for pairs of factors.
7.
FLASHCARD QUESTION
Front
What is the simplified form of √242?
Back
11√2
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