Scatter Plots & Two Way Tables

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.

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.

Front

What is the y-intercept in a linear equation?

Back

The y-intercept is the value of y when x is 0, representing the starting point of the relationship in a linear equation.

Front

How do you calculate the slope of a line?

Back

The slope is calculated by taking the change in y (rise) divided by the change in x (run) between two points on the line.

Front

What is a two-way table?

Back

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

Front

How do you find the percentage of a group in a two-way table?

Back

To find the percentage, divide the number of individuals in the group by the total number of individuals, then multiply by 100.

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.

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.

Front

What is the purpose of using a line of best fit?

Back

The purpose is to make predictions about one variable based on the value of another variable.

Front

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

Back

It means there is no apparent relationship between the two variables; the data points are scattered randomly.