Unit 7 Statistics Review for Test

Front

What does the slope of a scatter plot represent?

Back

The slope indicates the rate of change between two variables. For example, in a scatter plot showing gasoline prices vs. oil prices, a slope of $0.03 means gasoline price increases by $0.03 for every $1 increase in oil price.

Front

What is a negative linear relationship in a scatter plot?

Back

A negative linear relationship means that as one variable increases, the other variable decreases. For example, more hours spent watching TV may correlate with lower grades.

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, showing the general direction of the data points.

Front

How can you estimate values using a line of best fit?

Back

You can estimate values by finding the corresponding y-value on the line of best fit for a given x-value. For example, if the line indicates $750 for 25 lawns mowed, that is the estimated earnings.

Front

What is the rate of change in a function?

Back

The rate of change describes how much one quantity changes in relation to another. In the equation y = 3x, the rate of change is 3.

Front

What does it mean if a scatter plot has outliers?

Back

Outliers are data points that differ significantly from other observations. They can affect the slope and line of best fit.

Front

How do you interpret the y-intercept in a linear equation?

Back

The y-intercept is the value of y when x is 0. It represents the starting point of the relationship between the two variables.

Front

What is the difference between correlation and causation?

Back

Correlation indicates a relationship between two variables, while causation implies that one variable directly affects the other.

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two quantitative variables, using dots to represent data points.

Front

What does a positive linear relationship indicate?

Back

A positive linear relationship means that as one variable increases, the other variable also increases.