Mathematics 0580 · IGCSE · Scatter diagrams

Scatter diagrams — practice question

The scatter diagram displays the number of rooms against the number of people for eight buildings. The vertical axis is labelled \"Number of rooms\" from 0 to 70. The horizontal axis is labelled \"Number of people\" from 0 to 80.
(a)[1]

A building in the data set has 67 rooms. Write down how many people are in that building.

(b)[1]

In a different building there are 42 people and 33 rooms. Plot this point on the scatter diagram.

(c(i))[1]

On the scatter diagram, draw a line of best fit.

(c(ii))[1]

A different building has 45 people. Find an estimate for the number of rooms in this building.

(d)[1]

What type of correlation is shown in the scatter diagram?

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