4.1.2 Reflection & Practice (Pages 84-86)

Front

What is the growth rate of an oak tree that grows 10 feet in 4 years?

Back

2.5 feet per year

Front

Where is the unit rate shown on a graph for a plant's growth?

Back

It is at the y-coordinate for each line when the x-coordinate is 1.

Front

How do you find the difference in height between two plants after a certain time?

Back

Find the unit rate for each plant and then subtract the heights.

Front

What is a proportional relationship?

Back

A relationship where two quantities maintain a constant ratio.

Front

If TJ uses a ratio of 5 lemons to 1 cup of sugar, is this relationship proportional?

Back

No, the relationship is not proportional if the quantities do not maintain a constant ratio.

Front

How do you calculate the unit rate from a graph?

Back

The unit rate is the slope of the line, representing the change in y over the change in x.

Front

What does it mean for a relationship to be proportional?

Back

It means that as one quantity changes, the other quantity changes at a constant rate.

Front

If Plant A grows at a rate of 1.5 inches per week and Plant C at 3 inches per week, what is the difference in their heights after 15 weeks?

Back

15 inches per week.

Front

What is the formula for calculating growth rate?

Back

Growth Rate = (Final Height - Initial Height) / Time.

Front

How can you determine if a table of values represents a proportional relationship?

Back

Check if the ratios of corresponding values are constant.