Answer :
In this scenario, the best diagram Safia should use to record how the temperature changes during the day is a line graph.
Here's why a line graph is the most suitable choice:
Who: Safia, a student or data recorder.
What: Recording temperature changes over time, which is numerical data that varies throughout the day.
When: Over the course of a day, with time intervals, could be hourly or half-hourly.
Where: Any place where temperature monitoring is conducted, such as a classroom experiment, a weather station, or daily monitoring at home.
Why: Line graphs are ideal for showing trends over a continuous interval or time span. They allow you to observe how changes occur over time effectively.
How: By placing time on the x-axis (horizontal) and the temperature measurement on the y-axis (vertical), Safia can plot each recorded temperature at different times and connect these points with lines, showing the overall trend of temperature changes throughout the day.
In contrast, other options such as:
Dot plot: Typically used for displaying frequencies of data points and not suitable for showing continuous changes over time.
Scatter graph: Used for displaying relationships between two different variables, not ideal for a single variable over time.
Waffle diagram: This visualizes proportions and is not applicable for showing changes in temperature over time.
Therefore, a line graph effectively displays the trend of temperature changes Safia wants to record.
