Question

Line graphs can be made up of -

• A. horizontal lines
• B. vertical lines
• C. slanting lines
• D. None of the above.

Answer 1

Answer: (A), (C)

slanting lines

The number of houses built in a locality in different years is as follows: Year Number of Houses built

2014	6
2015	7
2016	7
2017	10
2018	12

We plot the year number on the horizontal axis and the number of houses built on the vertical axis.
Here, each data point is shown by a yellow dot.

Now connect the dots with straight lines.
The following graph is obtained.
The line connecting dots corresponding to 2014 and 2015 is a slanting line, whereas the line between 2015 and 2016 is horizontal.

A vertical line is not possible as only one frequency is mapped to a particular year.
This logic is valid for any other cases.

Hence, option (a) and (c) are correct.