Multiplying Fractions

Operations with Decimals

Constant of Proportionality

Unit Rate

Writing Equations

Solve

12 x 1/2

6

Solve.

1.2 x 3

3.6

Find the Constant of Proportionality (k).

x | 1 | 2 | 3 | 4

y | 3 | 6 | 9 | 12

k = 3

Maria walks 12 miles in 3 hours. How many miles does she walk per hour?

4 miles per hour

The job paid $25 for every 2 hours of work.

Write an equation that represents how much the job pays, y, for x hours of work.

y = 12.5x

Solve

3/4 x 4

3

Solve.

3.4 x 5

17

Find the Constant of Proportionality (k).

x | 11 | 9 | 4 | 2

y | 77 | 63 | 28 | 14

k = 7

A pump moves 42 gallons in seven minutes. Find the unit rate.

6 gallons per minute

Ms. Pandolfi bought 6 ice cream cakes for $48 dollars.

Write an equation that represents the total cost, y, of x ice cream cakes.

y = 8x

Solve

2/3 x 4/10

4/15

Solve.

2.1 x 0.5

1.05

Find the Constant of Proportionality (k).

x | 5 | 7 | 9 | 12

y | 40 | 56 | 72 | 96

k = 8

You score 84 points in six games. How much do you score per game?

14 points per game

The cost of 3 tickets to the concert is $27.

Find the constant of proportionality and write an equation for the problem.

k = 9

y=9x

Solve

150 x 2/15

20

Solve.

3.5 x 2.5

8.75

Find the Constant of Proportionality (k).

x | 30 | 20 | 5 | 0

y | 15 | 10 | 2.5 | 0

1/2

0.5

A skydiver falls 144 feet in three seconds. How far does the skydiver fall per second?

48 feet per second

Brooke earned $34 for 4 hours of work.

Find the constant of proportionality and write an equation for the problem.

k = 8.5

y=8.5x

Solve

25 x 6/2

75

Solve.

7.3 x 2.3

16.79

Find the Constant of Proportionality (k).

x | 24 | 28 | 12 | 16

y | 6 | 7 | 3 | 4

1/4

.25

One bag of pretzels costs three dollars. Five bags of pretzels costs $10. Which has the lower unit price?

Five bags of pretzels for $10

Ms. Gilder made Halloween cookies for her awesome homeroom. For every 2/3 cup of flour, she made 2 dozen cookies.

Write an equation that represents the cookies, y, for x cups of flour.

y = 1/3x

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