Proportional Relationships in a Graph

This video tutorial explains proportional relationships, focusing on how to identify them using graphs. It begins by defining proportional relationships as relationships between two equal ratios. An example is provided using Tyra's babysitting earnings, illustrating how to graph these relationships. The tutorial emphasizes that proportional relationships, when graphed, form a straight line passing through the origin. It then guides viewers on identifying proportional relationships in various graphs, highlighting that not all straight lines represent proportional relationships unless they pass through the origin. The lesson concludes with a recap of the key points covered.

What is the independent variable in the example of Tyra's earnings?

• The total number of babysitting jobs

• The rate of pay per hour

• The number of hours Tyra works

• The amount of money Tyra earns

What is a key feature of a graph that represents a proportional relationship?

• The graph forms a straight line that does not pass through the origin

• The graph forms a zigzag pattern

• The graph forms a straight line that passes through the origin

• The graph forms a curve

Why does the first graph not represent a proportional relationship?

• It forms a straight line that does not pass through the origin

• It forms a straight line that passes through the origin

• It does not form a straight line

• It forms a curve that passes through the origin

What is the issue with the second graph in terms of representing a proportional relationship?

• It forms a curve that passes through the origin

• It does not form a straight line

• It forms a straight line that does not pass through the origin

• It forms a straight line that passes through the origin

Which graph correctly represents a proportional relationship?

• The graph that forms a straight line passing through the origin

• The graph that forms a straight line not passing through the origin

• The graph that forms a curve

• The graph that forms a zigzag pattern