What is a scatterplot?
Scatterplots and Linear Regression

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•
Mathematics
•
9th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A scatterplot is a graph that displays values for typically two variables for a set of data. Each point represents an observation in the dataset.
2.
FLASHCARD QUESTION
Front
What does the line of best fit represent in a scatterplot?
Back
The line of best fit represents the trend in the data, showing the relationship between the two variables.
3.
FLASHCARD QUESTION
Front
How do you determine the line of best fit?
Back
The line of best fit can be determined using methods such as least squares regression, which minimizes the distance between the data points and the line.
4.
FLASHCARD QUESTION
Front
What is linear regression?
Back
Linear regression 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.
5.
FLASHCARD QUESTION
Front
What is the formula for a linear equation?
Back
The formula for a linear equation is typically written as y = mx + b, where m is the slope and b is the y-intercept.
6.
FLASHCARD QUESTION
Front
What does the slope of a line indicate in a scatterplot?
Back
The slope indicates the rate of change of the dependent variable as the independent variable changes. A positive slope means an increase, while a negative slope indicates a decrease.
7.
FLASHCARD QUESTION
Front
What does the y-intercept represent in a linear equation?
Back
The y-intercept represents the value of the dependent variable when the independent variable is zero.
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