Scatterplots and Trend Lines Practice

Front

What is a scatterplot?

Back

A scatterplot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional grid.

Front

What does a trend line represent in a scatterplot?

Back

A trend line is a straight line that best represents the data points in a scatterplot, indicating the general direction of the data.

Front

How do you interpret the slope of a trend line?

Back

The slope of a trend line indicates the rate of change between the two variables; a positive slope means that as one variable increases, the other also increases.

Front

What is the purpose of using scientific notation?

Back

Scientific notation is used to express very large or very small numbers in a compact form, making them easier to read and work with.

Front

Convert 0.00000346 to scientific notation.

Back

3.46 x 10^-6

Front

If the average daily temperature is 55°F, how can you estimate sales from a scatterplot?

Back

You can find the point on the scatterplot that corresponds to 55°F and read the estimated sales value from the graph.

Front

What is the best prediction method when using a scatterplot?

Back

The best prediction method is to look for the nearest data point or the trend line that corresponds to the given value.

Front

How do you determine the weight of a dog based on its height from a scatterplot?

Back

Locate the height on the scatterplot, then find the corresponding weight value either directly or by using the trend line.

Front

What does it mean if a scatterplot shows a negative correlation?

Back

A negative correlation means that as one variable increases, the other variable tends to decrease.

Front

What is the significance of outliers in a scatterplot?

Back

Outliers are data points that fall far from the trend line and can indicate unusual behavior or errors in data collection.