Flashcard 3-2

Front

What is a scatterplot?

Back

A scatterplot is a graph that shows the relationship between two quantitative variables. Each point represents an observation in the dataset.

Front

How can you interpret a scatterplot?

Back

You can interpret a scatterplot by looking for patterns, trends, or correlations between the two variables. For example, a downward trend may indicate a negative correlation.

Front

What does it mean if points on a scatterplot are closely clustered together?

Back

If points are closely clustered together, it indicates a strong correlation between the two variables.

Front

What is the Mean Absolute Deviation (MAD)?

Back

The Mean Absolute Deviation is a measure of the dispersion of a set of data points. It is calculated by taking the average of the absolute differences between each data point and the mean.

Front

How do you calculate the Mean Absolute Deviation?

Back

1. Find the mean of the data set. 2. Subtract the mean from each data point and take the absolute value. 3. Find the average of these absolute values.

Front

What is slope-intercept form of a linear equation?

Back

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

Front

What does the slope of a line represent?

Back

The slope represents the rate of change of the dependent variable (y) with respect to the independent variable (x). It indicates how steep the line is.

Front

What does the y-intercept represent 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 do you find the slope of a line given two points?

Back

The slope (m) can be calculated using the formula m = (y2 - y1) / (x2 - x1), where (x1, y1) and (x2, y2) are the coordinates of the two points.

Front

What is a linear relationship?

Back

A linear relationship is a relationship between two variables that can be represented by a straight line on a graph.