Definitions
Define ratio
comparison of 2 quantities (4:1)
Simplify 2/4
1/2
Convert to a mixed number: 5/3
1
2/3
In the equation k = y/x what does k stand for?
Constant of proportionality
10 x 5
50
What is the point (0,0) called?
origin
Simplify 10/5
2/1 or 2
Convert to a mixed number 13/6
2
1/6
How do you find the value of k?
Divide y by x
4 x 8
32
Define rate
comparison of 2 quantities with 2 different units (4 cups of water, 2 cups of soap)
Simplify 10/15
2/3
Convert to an improper fraction 1 1/2
3/2
If we have the points (3, 6) and (6, 12) what is the constant?
k = 2
20 / 5
4
Define unit rate
Comparison of 2 rates to identify the quantity of 1. (miles per hour)
Simplify 12/16
3/4
Convert to an improper fraction 2 4/5
14/5
y = 10
54 / 9
6
Define proportional
A straight line that passes through the origin
Simplify 22/40
11/20
Convert to an improper fraction 2 3/9
21/9
Kerry goes to dance class for the first 3 months of the year. At the end of month 1 she paid $12, after 2 months she paid $22, and after 3 months she paid $32. Are her payments for dance class proportional? Show proof.
No.
12/1 is not equivalent to 22/2 or 32/3
36 / 3
12