SP.A Retest

Front

What is the equation of the line of best fit?

Back

The equation of the line of best fit is a linear equation that best represents the data points in a scatter plot. It is used to predict values based on the relationship between two variables.

Front

What does a linear relationship between x and y mean?

Back

A linear relationship means that as one variable (x) changes, the other variable (y) changes at a constant rate. This relationship can be represented by a straight line on a graph.

Front

How do you calculate earnings based on hours worked?

Back

Earnings can be calculated by multiplying the number of hours worked by the hourly wage. For example, if Joe worked 30 hours and earns $20 per hour, his earnings would be 30 * 20 = $600.

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two quantitative variables. Each point on the plot represents an observation.

Front

What is a trend line?

Back

A trend line is a straight line that best represents the data in a scatter plot. It helps to visualize the relationship between the variables and can be used for predictions.

Front

How can you use a trend line to make predictions?

Back

You can use a trend line to predict values by finding the corresponding value on the line for a given input. For example, if you know the number of pages in a book, you can use the trend line to predict the number of chapters.

Front

What is the purpose of the line of best fit?

Back

The purpose of the line of best fit is to minimize the distance between the line and all the data points, providing the best estimate of the relationship between the variables.

Front

What does it mean if a scatter plot has no clear trend?

Back

If a scatter plot has no clear trend, it indicates that there is no significant relationship between the two variables being analyzed.

Front

What is the formula for a linear equation?

Back

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

Front

What is the slope of a line?

Back

The slope of a line is a measure of its steepness, calculated as the change in y divided by the change in x (rise/run). A negative slope indicates a decrease, while a positive slope indicates an increase.