Scatter Plots and Line of Best Fit

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 a positive association in a scatter plot indicate?

Back

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

Front

What does a negative association in a scatter plot indicate?

Back

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

Front

What does 'no association' mean in the context of a scatter plot?

Back

'No association' means that there is no discernible relationship between the two variables being plotted.

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, showing the general direction of the data.

Front

How do you determine the equation of the line of best fit?

Back

The equation of the line of best fit can be determined using statistical methods such as linear regression.

Front

What is the slope of a line in a scatter plot?

Back

The slope of a line indicates the rate of change of the dependent variable with respect to the independent variable.

Front

What does a slope of -2 in the equation y = -2x + 10 indicate?

Back

A slope of -2 indicates that for every 1 unit increase in x, y decreases by 2 units.

Front

What is the y-intercept in the equation y = -2x + 10?

Back

The y-intercept is the value of y when x is 0, which is 10 in this case.

Front

How can you tell if a line is an accurate line of best fit?

Back

A line is an accurate line of best fit if it minimizes the distance between itself and all the data points.