Math 8 - Scatterplots and Trend Lines (Flashcard 11.2)

Front

What does the y-intercept represent in a scatterplot comparing time spent exercising with body weight?

Back

The y-intercept represents how much a person weighs if they spend no time exercising.

Front

In the context of a trend line, what does a slope of 9 indicate?

Back

A slope of 9 indicates that the number of people at the beach increases by 9 for every temperature increase of 1 degree.

Front

How can you use a trend line to make predictions?

Back

You can use a trend line to estimate values based on the relationship between the variables represented in the scatterplot.

Front

What is an outlier in a data set?

Back

An outlier is a data point that differs significantly from other observations in the data set.

Front

How do you identify an outlier in a scatterplot?

Back

An outlier can be identified as a point that is distant from the overall pattern of the data.

Front

What is a trend line?

Back

A trend line is a straight line that best represents the data on a scatterplot, showing the general direction of the data.

Front

What does the equation of a trend line represent?

Back

The equation of a trend line represents the relationship between the independent variable (x) and the dependent variable (y).

Front

What is the formula for a linear trend line?

Back

The formula for a linear trend line is typically written as y = mx + b, where m is the slope and b is the y-intercept.

Front

What does a positive slope indicate in a trend line?

Back

A positive slope indicates that as the independent variable increases, the dependent variable also increases.

Front

What does a negative slope indicate in a trend line?

Back

A negative slope indicates that as the independent variable increases, the dependent variable decreases.