Scatter Plots/Best Fit Lines

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 line of best fit represent in a scatter plot?

Back

A line of best fit represents the trend of the data points in a scatter plot, helping to make predictions about one variable based on the other.

Front

How do you determine the slope of a line in slope-intercept form?

Back

The slope is determined by the coefficient of the x variable in the equation y = mx + b, where m is the slope.

Front

What is a positive correlation in a scatter plot?

Back

A positive correlation occurs when both variables increase together, resulting in an upward trend in the scatter plot.

Front

What is a negative correlation in a scatter plot?

Back

A negative correlation occurs when one variable increases while the other decreases, resulting in a downward trend in the scatter plot.

Front

What does it mean if there is no correlation between two variables?

Back

No correlation means that there is no discernible relationship between the two variables; changes in one do not affect the other.

Front

What is the purpose of using a trend line in a scatter plot?

Back

The purpose of a trend line is to summarize the data and help make predictions about future values.

Front

What is the formula for slope-intercept form?

Back

The formula for slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept.

Front

How can you use a scatter plot to make predictions?

Back

You can use a scatter plot to make predictions by extending the line of best fit to estimate values for one variable based on known values of the other.

Front

What is the y-intercept in a linear function?

Back

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