Question

The temperature of an urban area is on average more by $2^{o}C$ than its nearby rural area at each hour.
The hourly temperature data for the rural area is a follows: Time Temperature ${(}^{o}C)$ 1730 1830 1930 2030 2130 2230 2330

24
23
22
21
21
20
19

Plot a double line graph for the urban and rural area with the given data and select the correct plot.

• A.
• B.
• C.
• D. None of the above.

Answer 1

The correct option is B

Given: The temperature of an urban area is on average more by $2^{o}C$ than the rural area at each hour.

By adding $2^{o}C$ to the respective rural area temperature, we obtain the following table: Temperature ${(}^{o}C)$ Time Rural Area Urban Area $1730$ $1830$ $1930$ $2030$ $2130$ $2230$ $2330$

$24$	$24+2=26$
$23$	$23+2=25$
$22$	$22+2=24$
$21$	$21+2=23$
$21$	$21+2=23$
$20$	$20+2=22$
$19$	$19+2=21$

According to the tabulated data at 1730, rural area has a temperature of ${24}^{o}C$, while urban area has a temperature of ${26}^{o}C,$ and so on.

We plot line graphs of the temperatures corresponding to each type of areas separately on the same graph to obtain a double line graph.

The correct representation of the plot is shown by option (b).