Scatter Plots & Two Way Tables

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two variables by displaying data points on a two-dimensional grid.

Front

What does a trend line in a scatter plot represent?

Back

A trend line represents the general direction or pattern of the data points in a scatter plot, helping to predict values.

Front

How do you interpret a positive correlation in a scatter plot?

Back

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

Front

How do you interpret a negative correlation in a scatter plot?

Back

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

Front

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

Back

No correlation means there is no discernible pattern or relationship between the two variables.

Front

What is a two-way table?

Back

A two-way table is a data display that shows the relationship between two categorical variables.

Front

How do you calculate the percentage of a category in a two-way table?

Back

To calculate the percentage, divide the number of occurrences in that category by the total number of occurrences, then multiply by 100.

Front

What is the line of best fit?

Back

The line of best fit is a straight line that best represents the data on a scatter plot, minimizing the distance between the line and all data points.

Front

What is the formula for the slope of a line given two points (x1, y1) and (x2, y2)?

Back

The slope (m) is calculated as m = (y2 - y1) / (x2 - x1).

Front

What does the y-intercept represent in a linear equation?

Back

The y-intercept is the value of y when x is 0, indicating where the line crosses the y-axis.