Direct Proportionality And Inverse Proportionality Flashcards
When are two quantities directly proportional
Two quantities are directly proportional when one quantity is increased by a certain factor and the other quantity is increased by the same factor
How to calculate if 2 quantities are directly proportional
A/B = k
A = kB
Therefore A is directly proportional to B
The characteristics of a graph that is directly proportional
Two quantities that are in direct proportion will always produce a straight-line graph that passes through the origin
How do we know that 2 quantities are inversely proportional
Theo quantities are inversely proportional when one quantity is increased by a certain factor and the other quantity decreases by the same factor
How to calculate if 2 quantities are inversely proportional
AB = k
A = k/B
therefore A is inversely proportional to B
What is the symbol for direct proportionality
a∝b
What is the symbol for indirect proportionality
A ∝ 1/B
