Writing equations for trend lines practice

Front

What type of correlation would you likely see with the amount of time spent working compared to the amount of money earned?

Back

Positive correlation

Front

If m = -3/4 and b = 9, what is the equation of the trend line in y = mx + b?

Back

y = -3/4 x + 9

Front

What is a line of best fit used for?

Back

To make predictions

Front

Write the equation of the trend line given the scatter plot relationship between the number of chapters and the total number of pages: y = 10x + 0.

Back

y = 10x + 0

Front

In a scatterplot, what is a cluster?

Back

A group of points that are close together

Front

What does the slope (m) represent in the equation of a trend line?

Back

The rate of change between the variables

Front

What does the y-intercept (b) represent in the equation of a trend line?

Back

The value of y when x is 0

Front

How can you determine if a trend line is a good fit for a scatter plot?

Back

By checking how closely the points cluster around the line

Front

What is the purpose of using a trend line in data analysis?

Back

To summarize the relationship between variables and make predictions

Front

What does a negative correlation indicate in a scatter plot?

Back

As one variable increases, the other variable decreases