Topic 2 Review + Topic 3

2-1

100

Do the following represent a proportional relationship:

x      y

1----13

2----26

4----52

Yes all y/x ratios are equivalent.

200

Do the following represent a proportional relationship:

x       y

15----3

10----2

6-----1.2

Yes all y/x ratios are equivalent.

300

Do the following represent a proportional relationship:

x      y

1----2.5

3----7.5

5----17.5

No 2.5 is not the constant

400

Do the following represent a proportional relationship:

x     y

6----5

4----3.3333...

2----1.6666...

Yes all y/x ratios are the same.

2-2

100

Find the constant of proportionality:

(3,12)

4=k

200

Find the constant of proportionality:

x      y

7----49

3----21

2----14

7=k

300

Find what y will be when x is 10 using the following equation:

y=4x

y=40

400

Create an equation from the following chart:

x       y

63----7

45----5

27----3

y=1/9x

500

Find the constant of proportionality between these two points:

(2,8)

(3,10)

There is no constant that would make the two proportional.

2-3

100

Name the two criteria that a proportional graph must follow:

Starts at the origin (0,0)

Straight Line

200

Graph the following proportion:

x     y

1----2

2----4

3----6

y=2x

1 right for every x 2 up for every y

300

Graph the following proportion:

x       y

3-----1

6-----2

9-----4

There is no proportion, cannot make a graph

400

Graph the following equation:

y=1x

Start at 0,0

increase 1 for both x and y

500

Graph the following equation:

y=1/2x

Start at 0,0

For every 2 for x we go up 1 for y

2-4

100

Convert 22 meters to centimeters

Hint: 1 meter = 100 centimeters

2200cm

200

Convert 2367 meters into kilometers

Hint: 1 kilometer = 1000 meters

2.367km

300

Convert 3 miles into yards

Hint: 1 mile = 1760 yards

5280y

400

Convert 15 feet into meters

Hint: 1 foot = .305 meters

4.575m

500

Convert 75 pounds into kilograms

Hint: 1 kilogram = 2.204 pounds

Round to the nearest 100th

34.03kg

3-1

100

Part: 4

Whole: ?

%: 50%

8

200

Part: ?

Whole: 35

%: 15%

5.25

300

Part: 7

Whole: 70

%: ?

10%

400

What is 30% of 180

54

500

What is 120% of 22

26.4