Direct And Inverse Proportion

Question 1

What is direct proportion?

Answer 1

Two quantities A and B, are in direct proportion, if increasing ones increases the other one proportionally.

Question 2

What is the golden rule for direct proportion questions?

Answer 2

Divide for one, then times for all.

Question 3

What is inverse proportion?

Answer 3

Two quantities A and B, are in inverse proportion if increasing one quantity cause the other quantity to decrease proportionally.

Question 4

Inverse proportion

If quantity.A is doubled, what happens to quantity B?

Answer 4

Quantity B is halved

Question 5

Direct proportion

If quantity A is doubled what happens to quantity B?

Answer 5

Quantity B is doubled.

Question 6

What is the golden rule for inverse proportion?

Answer 6

Times for one, then divide for all

Question 7

What is algebraic proportion?

Answer 7

Two variables (often x and y) which are linked in some way.

Question 8

Check page 95 for symbol meaning proportional to

Answer 8

.

Question 9

How can you turn a proportion statement into an equation

Answer 9

By replacing the proportional to symbol with ‘=k’

Question 10

What is the equation for

y is proportional to x

Answer 10

y=Ki

Question 11

What is the equation for

y is inversely proportional to x

Answer 11

y = k/x

Question 12

What does k stand for in proportional equations?

Answer 12

An unknown constant number

Question 13

See page 95 for trickier proportions

Answer 13

.

Question 14

See p95 for how to graph this and handling algebra questions on proportion

Answer 14

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