New Zealand
Level 7 - NCEA Level 2

# Interpreting Information from Fitted Lines I

## Interactive practice questions

A dam used to supply water to the neighboring town had the following data recorded for its volume over a number of months.

 Month Volume (billions of litres) $1$1 $2$2 $3$3 $4$4 $120$120 $108$108 $106$106 $86$86
a

Given the data in the table, plot the points on the number plane.

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b

Which of the following lines best fits the data?

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A

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B

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C

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D

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A

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B

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C

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D
Easy
Approx a minute
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Adam measures his heart rate at various times while running.

The data is shown below.

The number of fish in a river is measured over a five year period.

The results are shown in the following table and plotted below.

One litre of gas is raised to various temperatures and its pressure is measured.

The data has been graphed below with a line of best fit.

### Outcomes

#### S7-2

S7-2 Make inferences from surveys and experiments: A making informal predictions, interpolations, and extrapolations B using sample statistics to make point estimates of population parameters C recognising the effect of sample size on the variability of an estimate

#### 91264

Use statistical methods to make an inference