Scatter Plots: Line of Best Fit

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 axis.

Front

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

Back

A line of best fit is a straight line that best represents the data points in a scatter plot, indicating the trend of the data.

Front

What is correlation in the context of scatter plots?

Back

Correlation refers to the relationship between two variables, indicating how one variable changes in relation to another.

Front

What does a positive correlation look like on a scatter plot?

Back

In a positive correlation, as one variable increases, the other variable also increases, resulting in an upward trend.

Front

What does a negative correlation look like on a scatter plot?

Back

In a negative correlation, as one variable increases, the other variable decreases, resulting in a downward trend.

Front

What is the purpose of the line of best fit?

Back

The line of best fit is used to make predictions about one variable based on the value of another variable.

Front

How can you determine the slope of a line of best fit?

Back

The slope of a line of best fit can be determined by calculating the change in y over the change in x (rise over run) between two points on the line.

Front

What does the y-intercept represent in the equation of a line?

Back

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

Front

How do you interpret the equation y = -2x + 1?

Back

In this equation, for every increase of 1 in x, y decreases by 2, and the line crosses the y-axis at 1.

Front

What is the significance of the data points in a scatter plot?

Back

Data points in a scatter plot represent individual observations or measurements of the two variables being analyzed.