Scatter Graphs & Trends Flashcards

All 5 cards in this deck

What is a positive correlation on a scatter graph?

As one variable increases, so does the other; the points run from lower left to upper right.

True or false? Points running from the top left to the bottom right of a scatter graph show a negative correlation.

True. As one variable increases, the other decreases.

Where should a line of best fit be drawn on a scatter graph?

A straight line through the centre of the scatter, with roughly as many points above as below; it need not touch any point.

What is the difference between interpolating and extrapolating a trend?

Interpolating reads a value within the range of the data; extrapolating extends the trend line beyond the data to predict.

What does a scatter graph show if there is no correlation?

The points are scattered with no clear pattern, so there is no relationship between the two variables.