scatter plots and line of best fit

Front

What is a scatter plot?

Back

A graph that shows the relationship of two data sets.

Front

What does the line of best fit represent in a scatter plot?

Back

It represents the trend of the data points, showing the overall direction of the data.

Front

What is the equation of a line in slope-intercept form?

Back

y = mx + b, where m is the slope and b is the y-intercept.

Front

What does a positive correlation in a scatter plot indicate?

Back

As one variable increases, the other variable also increases.

Front

What does a negative correlation in a scatter plot indicate?

Back

As one variable increases, the other variable decreases.

Front

What does it mean if a scatter plot has no correlation?

Back

There is no predictable relationship between the two variables.

Front

How can you determine the slope of a line from a scatter plot?

Back

By selecting two points on the line and using the formula (y2 - y1) / (x2 - x1).

Front

What is the purpose of the line of best fit?

Back

To make predictions about one variable based on the other.

Front

What is an example of a situation where a scatter plot would be useful?

Back

Analyzing the relationship between study time and test scores.

Front

What does it mean if a scatter plot is clustered tightly around the line of best fit?

Back

It indicates a strong correlation between the two variables.