Unit 3 Review - Scatter Plot & Line of Best Fit

Front

What does a negative slope indicate in a scatter plot?

Back

A negative slope indicates that as one variable increases, the other variable decreases.

Front

What is the meaning of the slope -5/7 in a real-world context?

Back

It means that for every 7 cups of coffee consumed, a person loses 5 hours of sleep.

Front

What type of correlation exists when one set of data increases while the other decreases?

Back

Negative correlation.

Front

What does it mean if there is no correlation between two variables in a scatter plot?

Back

It means that there is no predictable relationship between the two variables.

Front

What is the y-intercept in the context of a line of best fit?

Back

The y-intercept is the value of y when x is 0, representing the starting point of the line on the y-axis.

Front

How can you identify a scatter plot that shows a decreasing trend?

Back

A scatter plot that shows a decreasing trend will have points that slope downwards from left to right.

Front

What is the purpose of a line of best fit in a scatter plot?

Back

The line of best fit summarizes the relationship between the variables and helps predict future values.

Front

What does a positive correlation look like in a scatter plot?

Back

A positive correlation appears as points that slope upwards from left to right.

Front

How do you determine the slope of a line of best fit?

Back

The slope is determined by the change in y divided by the change in x between two points on the line.

Front

What is the significance of the correlation coefficient?

Back

The correlation coefficient quantifies the strength and direction of a relationship between two variables.