Exploring Constants of Proportionality in Ratios and Proportions

The video tutorial covers the concept of ratios and proportions through a road trip scenario. It compares the speeds of three families using different representations: a table, a sentence, and a graph. The constant of proportionality is used to determine the speed in miles per hour for each family. The tutorial also includes an example of comparing soda costs per ounce, emphasizing the importance of unit rates. The video concludes with instructions for Khan Academy practice and additional resources.

What is the primary topic discussed in the video?

• Biological theories

• Ratios and proportions

• Historical events

• Algebraic equations

Which family's speed is represented in a sentence?

• Melissa's family

• Alyssa's family

• Karen's family

• Jade's family

What does the constant of proportionality represent in this context?

• The distance of the road trip

• The time taken for the trip

• The cost of the trip

• The speed of the family's travel

How fast did Jade's family drive according to the calculations?

• 40 miles per hour

• 45 miles per hour

• 50 miles per hour

• 35 miles per hour

What mathematical equation is repeatedly used to calculate the speeds?

• k = x + y

• k = x * y

• k = y / x

• k = x / y

Which family drove the fastest?

• Jade's family

• Karen's family

• Melissa's family

• Alyssa's family

How is Alyssa's family's speed represented?

• Using a graph

• Through a sentence

• In a table

• Via a video clip

What new skill involving graphs was discussed in relation to Alyssa's family?

• Interpreting pie charts

• Calculating area under the curve

• Reading points on a graph

• Solving differential equations

What is the cost per ounce for Brand A?

• 12 cents

• 35 cents

• 10 cents

• 25 cents

Which brand of soda is the least expensive per ounce?

• Brand D

• Brand A

• Brand C

• Brand B