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New Zealand
Level 8 - NCEA Level 3

Line of best fit - calculating

Interactive practice questions

The average monthly temperature and the average wind speed in a particular location was plotted over several months. The graph shows the points for each month’s data and their line of best fit.

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Use the line of best fit to approximate the wind speed on a day when the temperature is $5$5°C.

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Which of the following could be the equation for the line of best fit?

Consider the scatter plot shown below.

Consider the scatter plot shown below.



Carry out investigations of phenomena, using the statistical enquiry cycle: A conducting experiments using experimental design principles, conducting surveys, and using existing data sets B finding, using, and assessing appropriate models (including linear regression for bivariate data and additive models for time-series data), seeking explanations, and making predictions C using informed contextual knowledge, exploratory data analysis, and statistical inference D communicating findings and evaluating all stages of the cycle.


Investigate bivariate measurement data


Use statistical methods to make a formal inference

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