Figure 1 -Refer to FigurE

question 36

Multiple Choice

Figure 1

$\begin{array}{ccccc}\text { Year } & \begin{array}{c}\text { Price of } \\\text { pens }\end{array} & \begin{array}{c}\text { Quantity of } \\\text { pens }\end{array} & \text { Price of books } & \begin{array}{c}\text { Quantity of } \\\text { books }\end{array} \\\hline 2013 & \text { R57 } & 100 & \text { R190 } & 50 \\2014 & \text { R57 } & 120 & \text { R228 } & 70 \\2015 & \text { R76 } & 120 & \text { R266 } & 70\end{array}$
-Refer to FigurE?.What is the approximate percentage increase in prices from 2014 to 2015?

• A)0 per cent
• B)13 per cent
• C)16 per cent
• D)38 per cent
• E)22 per cent

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Definitions:

Interrupted Time Series Design

Interrupted time series design is a research method that examines the effects of an intervention by analyzing observations before and after the intervention in a time series.

Mandatory Helmet Law

Legislation requiring the wearing of helmets in certain activities or contexts, often to enhance safety.

Motorcycle Fatalities

Deaths resulting from accidents involving motorcycles.

Independent Variable

A factor manipulated by the experimenter to investigate its effects on the dependent variable in a study.