Barton reads part of a book every night before he goes to bed. The graph shows the number of chapters that he reads over time.

Question

What is the unit rate?

Responses

118
chapter per day
1 18 chapter per day

13
chapter per day
1 3 chapter per day

3 chapters per day
3 chapters per day

18 chapters per day

18 chapters per day
Graph in the coordinate plane with title Bartons reading log. Vertical axis goes from 0 to 20 in increments of 1 and is labeled number of chapters read. Horizontal axis goes from 0 to 10 in increments of 1 and is labeled time in days. A ray on the graph starts at point begin ordered pair 0 comma 0 end ordered pair and goes through point begin ordered pair 6 comma 18 end ordered pair.

Answer 1

To find the unit rate, we need to determine how many chapters Barton reads per day based on the information given from the graph.

From the graph description, we see that Barton starts at (0,0) and goes through the point (6,18). This means that after 6 days, he has read 18 chapters.

To calculate the unit rate (chapters per day):

1. We take the total number of chapters read (18 chapters) and divide it by the total number of days taken (6 days).

\[ \text{Unit Rate} = \frac{\text{Total Chapters}}{\text{Total Days}} = \frac{18 \text{ chapters}}{6 \text{ days}} = 3 \text{ chapters per day} \]

Therefore, the unit rate is 3 chapters per day.