Trend Lines and Scatterplots

Front

What is a trend line?

Back

A trend line is a straight line that best represents the data on a scatter plot, showing the general direction of the data points.

Front

What does a scatterplot show?

Back

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

Front

What is the purpose of the line of best fit?

Back

The line of best fit is used to predict values and understand the relationship between variables in a scatterplot.

Front

How do you calculate the y-value using the equation of a line?

Back

Substitute the x-value into the equation and solve for y.

Front

What does a positive correlation in a scatterplot indicate?

Back

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

Front

What does a negative correlation in a scatterplot indicate?

Back

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

Front

What is the y-axis in a graph?

Back

The y-axis is the vertical line on a graph that represents the dependent variable.

Front

What is the x-axis in a graph?

Back

The x-axis is the horizontal line on a graph that represents the independent variable.

Front

What does it mean if there is no correlation in a scatterplot?

Back

No correlation means that there is no apparent relationship between the two variables.

Front

How can you identify a weak correlation in a scatterplot?

Back

A weak correlation is indicated by data points that are spread out and do not closely follow a trend line.