Scatter Plot Test Review

Front

What does a correlation coefficient (r) of -0.89 indicate?

Back

Strong negative correlation.

Front

In the equation y = 1/2x + 1, what does the variable x represent?

Back

The number of laps.

Front

What is the relationship between the height of students and their test scores if there is no correlation?

Back

There is no relationship between height and test scores.

Front

In the equation y = -2x + 7, what does the slope represent?

Back

For each hour of mowing, the mower is predicted to use (lose) 2 gallons of gas.

Front

What does the slope of the linear regression equation y = 61.93x - 1.79 represent?

Back

They drove at a speed of 61.93 miles per hour.

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two quantitative variables.

Front

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

Back

Points that trend upwards from left to right.

Front

What does a negative correlation look like on a scatter plot?

Back

Points that trend downwards from left to right.

Front

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

Back

The points are scattered without any clear trend.

Front

How can you determine the strength of a correlation?

Back

By looking at how closely the points cluster around a line of best fit.