Question

The graph shows the linear relationship between the height of a plant (in centimeters) and the time (in weeks) that the plant has been growing.


Which statements are correct? Check all that apply.

The rate of change is 4.
The rate of change is 1.
The rate of change is .
The plant grows 4 cm in 1 week.
The plant grows 1 cm in 4 weeks.

Answer 1

Correct answers:
- The rate of change is 4.
- The plant grows 4 cm in 1 week.

Reason: The slope (rate of change) of the line is rise/run = change in height (cm) per change in time (weeks) = 4 cm per week. Therefore the other statements (rate = 1, rate = 1/4, and "1 cm in 4 weeks") are incorrect.