

Constant of proportionality
Presentation
•
Mathematics
•
7th Grade
•
Easy
Standards-aligned
Reem Eleskandrani
Used 1K+ times
FREE Resource
4 Slides • 10 Questions
1
Constant of proportionality
What does this mean? Before we get to that lets take a look at some familiar examples

2
While exercising yesterday, i had the following information:
12 calories burned in 2 minutes
30 calories in 5 minutes
42 calories in 7 minutes.
Can you figure out how many i would burn in 10 minutes? How can we tell?
3
The unit rate here is also called the constant of proportionality. A constant is like a ratio in that it is just the numbers from the unit rate.
so here the constant is 6
4
Multiple Choice
5
Multiple Choice
6
Multiple Choice
What is the constant of proportionality for this table?
1/9
9
8
7
Multiple Choice
8
If there is a constant of proportionality in an example, then we say the relationship is PROPORTIONAL
BE CAREFUL: sometimes the relationship is almost proportional but then we say its not because the constant isn't the same for all.
9
Multiple Choice
Is this table proportional? Look across the table from x to y
yes
no
I'm not sure, I need extra help!
10
Multiple Choice
Proportional or Non-Proportional? Look vertically from x down to y
Proportional
Non-Proportional
11
Multiple Choice
12
Multiple Choice
Does the table represent a proportional relationship? Look from x to y
Yes.
No.
13
Multiple Choice
Is this table proportional or not proportional
Proportional
Not Proportional
14
Multiple Choice
Is this table proportional or not?
Proportional
Not Proportional
Constant of proportionality
What does this mean? Before we get to that lets take a look at some familiar examples

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