Question

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.

What is the unit rate?

a.) 1/18 chapter per day

b.) 1/3 chapter per day

c.) 3 chapters per day

d.) 18 chapters per day

Answer 1

C

Explanation:

Answer 2

The unit rate is the rate of change per day or the slope.

To get the slope of the line, we use the slope formula:

`m=(y_(2)-y_(1))/(x_(2)-x_(1))`

Where
`(x_(1),y_(1))` is point 1 on the line and tex](x_{2},y_{2})[/tex] is point 2 on the line.

Let's take 2 points from the line and calculate the slope. We will take the points (0,0) and (1,3) (any two points on the line will give the correct answer).

`m=(3-0)/(1-0) \\m=(3)/(1)\\m=3`

This means Barton reads 3 chapters per day. Answer choice C is right.

ANSWER: C