Scattered Plot and Line of Best Fit

Front

What is the line of best fit?

Back

A straight line that best represents the trend of the data on a scatter plot

Front

What should the line of best fit do?

Back

Go through the 'center' of the data

Front

What is the purpose of a line of best fit?

Back

To predict outcomes not found in the data

Front

How do you find the slope of the line-of-best-fit?

Back

By dividing the difference in y-coordinates by the difference in x-coordinates of any two points on the line

Front

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

Back

The point where the line crosses the y-axis

Front

Meaning of the slope in a line-of-best-fit equation?

Back

The rate at which y increases as x increases

Front

What does the y-intercept mean in the context of pollution index and dead fish?

Back

The number of dead fish when the pollution index is 0

Front

What does the slope represent in the context of pollution index and dead fish?

Back

For every increase in the pollution index by 1 unit, there are nine or ten more fish deaths during the year

Front

If the pollution index is 50, how many dead fish would you predict to encounter? Options: 600 dead fish, 592 dead fish, 580 dead fish, 1120 dead fish

Back

592 dead fish

Front

If the number of dead fish encountered is 438, what would be a good prediction of the pollution index? Options: 36, 34, 35, 37

Back

36