proportional relationship
Proportions are the comparison of two equal ratios. Therefore, proportional relationships are relationships between two equal ratios.
a relationship where the ratios between two kinds of values is always the same
ratio
The comparison when two (or more) numbers are compared by division.
rate
A ratio that compares two quantities measured in different units
unit rate
A rate in which the second quantity in the comparison is one unit;
a rate that has a denominator of 1
unit cost
A unit rate that gives the cost per unit;
constant rate of change
The rate of change between any two points in a linear relationship is the same or constant.
constant of proportionality
The constant ratio between two quantities
constant speed
a rate comparing distance to time. d = rt
conversion
to change from one unit of measure to another
proportion
An equation stating that two ratios are equal
customary system
The system of measurement used in the United States. It uses things like feet, yards, pounds, tons, quarts, etc..
metric system
A system of measurement based on tens. The basic unit of capacity is the liter. The basic unit of length is the meter. The basic unit of mass is the gram.
9
7
5
8
6
25
14
30
20
32
18
16
50
55
10.2
24
-2
33
9.3
2.7
1/2 = x/8
4
1/3 = 3/x
9
2/5 = 6/x
15
x/14 = 1/7
2
x/15 = 2/5
6
1/2 = x/9
4.5
1/4 = 20/x
80
3/5 = 15/x
25
4/9 = x/27
12
1/8 = 4/x
32
3/10 = 27/x
90
x/8 = 5/20
2
3/9 = 2/x
6
10/x = 7/70
100
1/x = 2/10
5
unit ratio
A unit rate where the denominator is one unit.
unit rate
A rate with a denominator of one when simplified.
proportion
An equation that states that two ratios are equal
dimensional analysis
A technique of problem-solving that uses the units that are part of a measurement to help solve the problem
equivalent ratios
Two ratios that describe the same relationship
ratio
A comparison of two quantities by division
scaling
to multiply or divide two related quantities by the same number
scale factor
A scale written as a ratio without units in simplest form
ratio table
a table with columns filled with pairs of numbers that have the same ratio
rate
A ratio comparing two quantities with different kinds of units
9
7
5
8
6
25
14
30
20
32
18
16
50
55
10.2
24
-2
33
9.3
2.7
9
7
5
8
6
25
14
30
20
32
18
16
50
55
10.2
24
-2
33
9.3
2.7
21/2
55/3
141/13
1/15