Unit 4.D CW: Scatterplots and 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 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

How can you use a scatter plot to make predictions?

Back

You can use the line of best fit to estimate values for one variable based on the value of another variable.

Front

What is a positive correlation?

Back

A positive correlation occurs when one variable increases as the other variable also increases.

Front

What is a negative correlation?

Back

A negative correlation occurs when one variable increases while the other variable decreases.

Front

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

Back

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

Front

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

Back

The slope of a line of best fit is determined by the change in the y-value divided by the change in the x-value between two points on the line.

Front

What is the equation of a line in slope-intercept form?

Back

The equation of a line in slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept.

Front

What is the y-intercept in a linear equation?

Back

The y-intercept is the point where the line crosses the y-axis, representing the value of y when x is 0.

Front

How can you identify a line of best fit on a scatter plot?

Back

A line of best fit can be identified as a straight line that best represents the data points, minimizing the distance from all points to the line.