Chapter 3:Ratio and Proportion, 3.2:Direct Proportion

0.0(0)
Studied by 0 people
call kaiCall Kai
Locked
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
GameKnowt Play
Card Sorting

1/12

encourage image

There's no tags or description

Looks like no tags are added yet.

Last updated 3:36 PM on 9/20/26
Name
Mastery
Learn
Test
Matching
Spaced
Call with Kai
Chat

No analytics yet

Send a link to your students to track their progress

13 Terms

1
New cards
What is direct proportion?
Two quantities are directly proportional when they increase or decrease in the same ratio
2
New cards
What does y ∝ x mean?
y is directly proportional to x
3
New cards
What is the equation for direct proportion?
y = kx
4
New cards
What does k represent in direct proportion?
The constant of proportionality
5
New cards
How do you find the constant of proportionality?
Divide y by x
6
New cards
What stays constant in direct proportion?
The ratio y ÷ x
7
New cards
What happens to y if x doubles?
y also doubles
8
New cards
What happens to y if x is halved?
y is also halved
9
New cards
What does the graph of directly proportional quantities look like?
A straight line passing through the origin
10
New cards
What point must a direct proportion graph pass through?
The origin
11
New cards
What does a steeper direct proportion graph indicate?
A larger constant of proportionality
12
New cards
How can you use direct proportion to find an unknown value?
Find the constant of proportionality and use it in y = kx
13
New cards
What is the key difference between direct proportion and an ordinary straight-line relationship?
A direct proportion graph must pass through the origin