Question

Identifying a Relationship in a Scatterplot
The graph shows the data of texting speed according to time.

A graph has time (minutes) on the x-axis and texting speed (words per minute) on the y-axis. Points are at (1, 14), (1, 18), (2, 10), (2, 15), (2, 17), (3, 14), (4, 10), (4, 15), (5, 6), and (5, 10).

Use the scatterplot to determine if there is a relationship. If there is a relationship, explain it.
Yes, there is a relationship. As time increases, texting speed increases.
Yes, there is a relationship. As time increases, texting speed decreases.
Yes, there is a relationship. As texting speed increases, time increases.
No, there is no relationship displayed.

Answer 1

Yes — there is a relationship. As time increases, texting speed decreases.

Evidence: the average speeds by minute are
- minute 1: 16 wpm
- minute 2: 14 wpm
- minute 3: 14 wpm
- minute 4: 12.5 wpm
- minute 5: 8 wpm

These averages (and the plotted points) show a downward trend.