# 7.2 Introducing Proportional Relationships

### Lesson 1

• I can use equivalent ratios to describe scaled copies of shapes.
• I know that two recipes will taste the same if the ingredients are in equivalent ratios.

### Lesson 2

• I can use a table to reason about two quantities that are in a proportional relationship.
• I understand the terms proportional relationship and constant of proportionality.

### Lesson 3

• I can find missing information in a proportional relationship using a table.
• I can find the constant of proportionality from information given in a table.

### Lesson 4

• I can write an equation of the form $y=kx$ to represent a proportional relationship described by a table or a story.
• I can write the constant of proportionality as an entry in a table.

### Lesson 5

• I can find two constants of proportionality for a proportional relationship.
• I can write two equations representing a proportional relationship described by a table or story.

### Lesson 6

• I can find missing information in a proportional relationship using the constant of proportionality.
• I can relate all parts of an equation like $y = kx$ to the situation it represents.

### Lesson 7

• I can decide if a relationship represented by a table could be proportional and when it is definitely not proportional.

### Lesson 8

• I can decide if a relationship represented by an equation is proportional or not.

### Lesson 9

• I can ask questions about a situation to determine whether two quantities are in a proportional relationship.
• I can solve all kinds of problems involving proportional relationships.

### Lesson 10

• I know that the graph of a proportional relationship lies on a line through $(0,0)$.

### Lesson 11

• I can draw the graph of a proportional relationship given a single point on the graph (other than the origin).
• I can find the constant of proportionality from a graph.
• I understand the information given by graphs of proportional relationships that are made up of points or a line.

### Lesson 12

• I can compare two, related proportional relationships based on their graphs.
• I know that the steeper graph of two proportional relationships has a larger constant of proportionality.

### Lesson 13

• I can interpret a graph of a proportional relationship using the situation.
• I can write an equation representing a proportional relationship from a graph.

### Lesson 14

• I can make connections between the graphs, tables, and equations of a proportional relationship.
• I can use units to help me understand information about proportional relationships.

### Lesson 15

• I can answer a question by representing a situation using proportional relationships.