Proportions

Identifying Proportions

100

Are these ratios proportional? (yes or no) 5/10 and 8/18

no

200

Are these ratios proportional? (yes or no) 9/12 and 15/20

yes

300

Are these ratios proportional? (yes or no) 10/12 and 15/18

yes

400

Are these ratios proportional? (yes or no) 3/4 nand 5/6

no

500

Which ratio is NOT equivalent to 32/48? a. 2/3 b. 8/12 c. 64/96 d. 128/144

D. 128/144

Vocabulary

100

2 equal ratios form a __________

proportion

200

This is the amount for one of something, such as the cost for 1 i item

unit rate

300

The number that you constantly multiply be in a proportional relationship

constant of proportionality

400

This letter represents the constant of proportionality in equations

k

500

Equal ratios will have equal ______  __________.

(What you get when you multiply diagonally)

cross products

Solving Proportions

100

n/10 = 28/8

n = 35

200

25/20 = 45/x

x = 36

300

Eight oranges cost $1.00. How much will 5 dozen oranges cost?

$7.50

400

Grapes are sold for $3 per bag. If you have $12, how many bags of grapes can you buy?

4 bags of grapes

500

You can buy six cans of soda for $2.50. How many cans of root beer can you buy for $10?

24 cans

Solving Proportions

100

4/h = 12/24

h = 8

200

x/9 = 19/57

x = 3

300

A recipe calls for 2 eggs to make 10 pancakes. How many eggs will you need to make 35 pancakes?

7 eggs

400

When juggling, a ball travels in a complete circle every 2 seconds. How many circles does it make in a minute?

30 circles

500

Pokemon cards come in packs of a dozen cards. Matt has 132 Pokemon cards. How many packs of pokemon cards did he buy?

11 packs of cards

Miscellaneous

100

What kind of pet does Mrs. Denton have?

cat

200

What was the name of Mrs. Denton's student teacher?

Mrs. Tucker

300

What is Mrs. Denton's classroom number?

238

400

Why was 6 afraid of 7?

Because 7 8 9

500

What is a math teacher's favorite snake?

a pi-thon