Direct and Inverse Proportion

Proportional Relationships

Understanding direct and inverse proportional relationships

Introduction to Proportional Relationships

Proportional relationships can be direct or inverse.

In direct relationships, as one variable increases, the other also increases.

In inverse relationships, as one variable increases, the other decreases.

Multiple Choice

What are the two types of proportional relationships?

• Direct and indirect

• Direct and inverse

• Positive and negative

• Increasing and decreasing

Draw

Shaun eats six egg whites a day with a protein content of 21.6 grams. Calculate his protein intake,

if he consumes 9 egg whites a day.

Multiple Choice

What equation represents direct proportion?

• y = kx

• y = k + x

• y = k/x

• y = k * x

Multiple Choice

if distance (d) is directly proportional to speed (s) which of the following equation is correct

• d = ks

• d = k + s

• d = k/s

• y = k * x

Direct & Inverse proportion in tables

Multiple Choice

What formula should be used to solve problems with inverse proportion?

• 𝑥 = 𝑘/𝑦

• 𝑥 = 𝑦/𝑘

• 𝑥 = 𝑘*y

• 𝑥 = 𝑦/k

Open Ended

How much confident you are now for solving problems related to direct and inverse proportion?