Making Predictions and Reading Scatterplots

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What is a scatterplot?

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A scatterplot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

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CCSS.8.SP.A.1

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What does a positive correlation indicate in a scatterplot?

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

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CCSS.HSS.ID.B.5

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What does a negative correlation indicate in a scatterplot?

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

Tags

CCSS.HSS.ID.B.5

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What does 'no correlation' mean in the context of a scatterplot?

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No correlation means there is no discernible relationship between the two variables; changes in one do not affect the other.

Tags

CCSS.HSS.ID.B.5

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What is a line of best fit?

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A line of best fit is a straight line that best represents the data on a scatterplot, showing the overall trend of the data points.

Tags

CCSS.8.EE.B.5

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How do you determine the line of best fit in a scatterplot?

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The line of best fit is determined by minimizing the distance between the line and all the data points, often using methods like least squares.

Tags

CCSS.8.EE.B.5

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What is the purpose of making predictions using a scatterplot?

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The purpose is to estimate the value of one variable based on the value of another variable, using the trend shown in the scatterplot.

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How can you use a scatterplot to predict the value for a specific data point?

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You can locate the specific value on the x-axis, find the corresponding point on the scatterplot, and read the predicted value on the y-axis.

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What does it mean if a scatterplot has no trend?

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If a scatterplot has no trend, it means the data points are scattered randomly, indicating no relationship between the variables.

Tags

CCSS.HSS.ID.B.5

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What is an example of a negative correlation in real life?

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An example of a negative correlation is the relationship between the number of days absent from school and a student's math grade.

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CCSS.HSS.ID.B.5