Unit 3 Summative Study Guide

Front

What is a line of best fit?

Back

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

Front

What does a positive association in a scatter plot indicate?

Back

As one variable increases, the other variable also increases.

Front

What does a negative association in a scatter plot indicate?

Back

As one variable increases, the other variable decreases.

Front

What does 'no association' mean in a scatter plot?

Back

There is no discernible relationship between the two variables.

Front

How do you determine the slope of a line?

Back

The slope is calculated as the change in y divided by the change in x (rise/run).

Front

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

Back

y = mx + b, where m is the slope and b is the y-intercept.

Front

What is the significance of the y-intercept in a linear equation?

Back

It is the point where the line crosses the y-axis (when x=0).

Front

How can you identify a positive association from a set of data?

Back

If the data points trend upwards from left to right on a scatter plot.

Front

How can you identify a negative association from a set of data?

Back

If the data points trend downwards from left to right on a scatter plot.

Front

What does it mean if a scatter plot shows a constant association?

Back

The values of one variable remain unchanged regardless of the other variable.