What is the line of best fit?
Calculating Line of Best Fit
Flashcard
•
Mathematics
•
9th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The line of best fit is a straight line that best represents the data on a scatter plot. It shows the trend of the data points and can be used to make predictions.
2.
FLASHCARD QUESTION
Front
How do you calculate the slope of a line?
Back
The slope (m) of a line is calculated using the formula m = (y2 - y1) / (x2 - x1), where (x1, y1) and (x2, y2) are two points on the line.
3.
FLASHCARD QUESTION
Front
What does a positive slope indicate?
Back
A positive slope indicates that as the x-value increases, the y-value also increases, showing a direct relationship between the two variables.
4.
FLASHCARD QUESTION
Front
What does a negative slope indicate?
Back
A negative slope indicates that as the x-value increases, the y-value decreases, showing an inverse relationship between the two variables.
5.
FLASHCARD QUESTION
Front
What is the y-intercept of a line?
Back
The y-intercept is the point where the line crosses the y-axis, represented by the value of y when x = 0.
6.
FLASHCARD QUESTION
Front
How can you determine the equation of a line from a graph?
Back
To determine the equation of a line from a graph, identify the slope and y-intercept, then use the slope-intercept form: y = mx + b.
7.
FLASHCARD QUESTION
Front
What is the purpose of the line of best fit in data analysis?
Back
The line of best fit helps to summarize the relationship between two variables, making it easier to analyze trends and make predictions.
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