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Vocab
Proportional Relationships
Unit Rate
Slope
Ratios
100
The ratio of the vertical change to the horizontal change or "rise over run"
What is slope?
100

   3x                   12

_____     =     _______

   9                     18

x = 2
100
What is the unit rate?  Use problem # 3 (page 2)
$.99 per song
100
Find the slope.  Problem #4 (page 6)
m=1/2
100
This is the ratio of hashtags to dollar signs. ###&&
3/2
200
A comparison of two quantities by division.
What is a ratio?
200
Tell whether  x and y are proportional.  problems #4 (page 9)
Yes. 

 One example; cross multiplying 3x5 = 15 and 2 x 7.5 = 15



200
What is the unit rate.  See problem #4 (page 2)
3.5 gallons per hour
200
Find the slope.  Problem # 6  (page 8)
M=5
200
Are three ways we can write the ratio of 2 erasers to 6 pencils.
2/6, 2:6, 2 to 6
300
Has a denominator of 1 when the ratio is written as a fraction?
Unit Rate
300

48 pens are packaged in 4 boxes. How many pens are packaged in 9 boxes?

108 pens

300
What is the better buy of tennis balls? Include each unit rate.  See problem 4b  (page 2)
6 balls for $16.79   is $2.80 per can

4 balls for $11.49   is $2.88 per can

300
Find the slope.  Problem # 5 (page 6)
m = .4/1 or .4
300

Write the ratio as a fraction in the simplest form. 18 red buttons : 12 blue buttons.

3/2
400
Two ratios that are equivalent.
What is a proportion?
400
Write a proportion to find out how many points a student needs to score on the test to get the given score.

Test worth 50 points; Test score 40%

   x                40

_____  =    ______

   50              100

400
Find the unit rate.  150 miles in 2.5 hours
60 MPH
400
Find the slope.  Problem 17a (page 7)
m = 1/2
400
What is the cross product of


  2               8

____   =   _____

  5              20

What is 40.
500
French word meaning to climb or rise?
Monter
500
   7              42

_____   =  _____

   n              48

n = 8
500

How much faster are you traveling than your friend? Using graph 4a. (page 2)

You: 50 MPH

Friend: 30 MPH


You are traveling 20 more MPH

500
Find the slope.  Problem #7 (page 8)
m = 3/2
500
Write the ratio as a fraction in the simplest form 3/4 inches compared to 3/5 inches.
5/4