Linear Regression & Scatterplots

Flashcard
•
Mathematics
•
8th - 9th Grade
•
Hard
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15 questions
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1.
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.
2.
FLASHCARD QUESTION
Front
What is a Scatterplot?
Back
A scatterplot is a graphical representation of two variables where each point represents an observation. It helps to visualize the relationship between the variables.
3.
FLASHCARD QUESTION
Front
What does a positive correlation indicate in a scatterplot?
Back
A positive correlation indicates that as one variable increases, the other variable also tends to increase.
4.
FLASHCARD QUESTION
Front
What does a negative correlation indicate in a scatterplot?
Back
A negative correlation indicates that as one variable increases, the other variable tends to decrease.
5.
FLASHCARD QUESTION
Front
What is the equation of a line in linear regression?
Back
The equation of a line in linear regression is typically expressed as y = mx + b, where m is the slope and b is the y-intercept.
6.
FLASHCARD QUESTION
Front
How do you interpret the slope in a linear regression equation?
Back
The slope (m) in a linear regression equation indicates the change in the dependent variable (y) for each one-unit increase in the independent variable (x).
7.
FLASHCARD QUESTION
Front
What is the y-intercept in a linear regression equation?
Back
The y-intercept (b) is the value of y when the independent variable (x) is zero. It represents the starting point of the line on the y-axis.
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