Ch. 6 Test review

Front

What is the line of best fit?

Back

The line of best fit is a straight line that best represents the data on a scatter plot, showing the trend of the data points.

Front

What does the equation y = 1/2x + 1 represent in a trend line?

Back

This equation represents a linear relationship where for every increase of 1 in x, y increases by 1/2, starting from 1.

Front

What is an unbiased survey question?

Back

An unbiased survey question is one that does not lead the respondent to a particular answer, such as 'Which do you prefer, apples or oranges?'

Front

What type of correlation does a scatterplot with a downward trend display?

Back

Negative correlation.

Front

What does a positive correlation indicate?

Back

A positive correlation indicates that as one variable increases, the other variable also increases.

Front

What is the formula for the line of best fit in the context of data analysis?

Back

The formula for the line of best fit is typically expressed as y = mx + b, where m is the slope and b is the y-intercept.

Front

How can you determine the number of laps a bicycle can make in a given time using a trend line?

Back

By substituting the time into the equation of the trend line to find the corresponding value.

Front

What is the significance of the slope in a linear equation?

Back

The slope indicates the rate of change between the two variables represented in the equation.

Front

What does it mean if a scatterplot shows no correlation?

Back

It means there is no discernible relationship between the two variables being plotted.

Front

How does a negative correlation affect the relationship between two variables?

Back

A negative correlation means that as one variable increases, the other variable decreases.