Math 4 Unit 2 Functions Test Class 3B

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What is a linear regression model?

Back

A linear regression model is a statistical method used to model the relationship between a dependent variable and one or more independent variables by fitting a linear equation to observed data.

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How do you interpret the slope in a linear regression equation?

Back

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What is the purpose of using Desmos in data analysis?

Back

Desmos is a graphing calculator that allows users to visualize data, perform regression analysis, and explore mathematical concepts interactively.

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What does the term 'correlation' refer to in statistics?

Back

Correlation measures the strength and direction of a linear relationship between two variables, ranging from -1 (perfect negative correlation) to +1 (perfect positive correlation).

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What does a positive correlation indicate?

Back

A positive correlation indicates that as one variable increases, the other variable also tends to increase.

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What does a negative correlation indicate?

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A negative correlation indicates that as one variable increases, the other variable tends to decrease.

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What is the difference between a function and a relation?

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A function is a specific type of relation where each input (x-value) is associated with exactly one output (y-value).

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How do you find the composition of two functions, f and g?

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The composition of two functions, denoted as g(f(x)), involves substituting the output of f(x) into the function g.

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What is the formula for a linear regression equation?

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What is the significance of the y-intercept in a linear equation?

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The y-intercept is the value of y when x is zero, representing the point where the line crosses the y-axis.