8th Scatterplots & Line of BEST fit

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•
Mathematics
•
8th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a scatter plot?
Back
A scatter plot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.
2.
FLASHCARD QUESTION
Front
What does the line of best fit represent in a scatter plot?
Back
The line of best fit represents the trend in the data, showing the general direction that the data points follow.
3.
FLASHCARD QUESTION
Front
How do you determine the slope of a line from a scatter plot?
Back
The slope of a line can be determined by selecting two points on the line and using the formula: slope = (change in y) / (change in x).
4.
FLASHCARD QUESTION
Front
What does a positive correlation in a scatter plot indicate?
Back
A positive correlation indicates that as one variable increases, the other variable also tends to increase.
5.
FLASHCARD QUESTION
Front
What does a negative correlation in a scatter plot indicate?
Back
A negative correlation indicates that as one variable increases, the other variable tends to decrease.
6.
FLASHCARD QUESTION
Front
How can you predict a value using a trend line in a scatter plot?
Back
To predict a value, locate the desired x-value on the horizontal axis, then find the corresponding y-value on the trend line.
7.
FLASHCARD QUESTION
Front
What is the formula for calculating the slope from a table of values?
Back
The slope can be calculated using the formula: slope = (y2 - y1) / (x2 - x1), where (x1, y1) and (x2, y2) are two points on the line.
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