Topic 4 Review

Front

What is a positive correlation?

Back

A positive correlation means that as one variable increases, the other variable also increases. For example, the further you run, the further you jump.

Front

What is a negative correlation?

Back

A negative correlation means that as one variable increases, the other variable decreases. For example, as the outside temperature increases, the amount of layers you wear decreases.

Front

What does a scatter plot show?

Back

A scatter plot displays the relationship between two variables, showing how one variable may change in relation to another.

Front

What is a line of best fit?

Back

A line of best fit is a straight line that best represents the data on a scatter plot, indicating the trend of the data.

Front

What does the slope of a line represent?

Back

The slope of a line represents the rate of change between the two variables. A positive slope indicates an increase, while a negative slope indicates a decrease.

Front

If the slope is -5/7, what does it mean?

Back

It means that for every 7 cups of coffee consumed, there is a loss of 5 hours of sleep.

Front

How do you write an equation for a trend line?

Back

An equation for a trend line can be written in the form y = mx + b, where m is the slope and b is the y-intercept.

Front

What is the y-intercept in a linear equation?

Back

The y-intercept is the value of y when x is 0, representing where the line crosses the y-axis.

Front

What does it mean if there is no correlation between two variables?

Back

No correlation means that there is no predictable relationship between the two variables; changes in one do not affect the other.

Front

What is an example of a positive correlation in real life?

Back

An example of a positive correlation is the relationship between study time and test scores; more study time typically leads to higher scores.