Unit 5

Vocab

100

The ratio of the vertical change to the horizontal change or "rise over run"

What is slope?

200

A comparison of two quantities by division.

What is a ratio?

300

Has a denominator of 1 when the ratio is written as a fraction?

Unit Rate

400

Two ratios that are equivalent.

What is a proportion?

500

French word meaning to climb or rise?

Monter

Proportional Relationships

100

   3x                   12

_____     =     _______

   9                     18

x = 2

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

300

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

108 pens

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

500

   7              42

_____   =  _____

   n              48

n = 8

Unit Rate

100

What is the unit rate?  Use problem # 3 (page 2)

$.99 per song

200

What is the unit rate.  See problem #4 (page 2)

3.5 gallons per hour

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

400

Find the unit rate.  150 miles in 2.5 hours

60 MPH

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

Slope

100

Find the slope.  Problem #4 (page 6)

m=1/2

200

Find the slope.  Problem # 6  (page 8)

M=5

300

Find the slope.  Problem # 5 (page 6)

m = .4/1 or .4

400

Find the slope.  Problem 17a (page 7)

m = 1/2

500

Find the slope.  Problem #7 (page 8)

m = 3/2

Ratios

100

This is the ratio of hashtags to dollar signs. ###&&

3/2

200

Are three ways we can write the ratio of 2 erasers to 6 pencils.

2/6, 2:6, 2 to 6

300

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

3/2

400

What is the cross product of

  2               8

____   =   _____

  5              20

What is 40.

500

Write the ratio as a fraction in the simplest form 3/4 inches compared to 3/5 inches.

5/4