Unit 9 Test

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.

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.

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.

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.

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.

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.

Front

What is the simplified form of √242?

Back

11√2

Front

What is a linear expression?

Back

A linear expression is an algebraic expression in which each term is either a constant or the product of a constant and a single variable.

Front

How do you identify the pattern in a linear expression?

Back

To identify the pattern, determine the coefficient of the variable and the constant term, which indicate the rate of change and starting value, respectively.

Front

What is the formula for the nth term of a linear sequence?

Back

The nth term of a linear sequence can be expressed as aₙ = a₁ + (n-1)d, where d is the common difference.