Unit 3 Review

Unit 3 Review

Poll

Did you complete the Question of the Day?

• Yes

• No

• How do I complete the Question of the day?

Poll

Stress Check

• I'm in a good space & can focus.😁

• Something is bothering me, but I can still focus.😏

• I can't manage my emotions or behaviors right now.😩

Open Ended

Type 2 things you learned about unit rate as slope, representing proportional relationships, or direct variation.

Unit Rate as Slope

Multiple Choice

You spend $40 on 5 pounds of concrete. What is the unit rate in dollars per pound?

• $8 per pound
• $5 per pound
• $35 per pound
• 0.125 pounds per dollar

Multiple Choice

Dev keeps a record in graph form of how far his car travels and the number of gallons of gasoline it uses.

What is the unit rate of the graph?

• 64

• 128

• 32

• 16

Multiple Choice

If Justin can type 408 words in 4 minutes, how many words can he type per minute?

• 102 words per minute
• 100 words per minute
• 400 words per minute
• 412 words per minute

Multiple Choice

What is Joseph's unit rate?

• 1/8 mile per hour

• 8 miles per hour

• 8 hours per mile

• 1/8 hour per mile

Multiple Choice

Which of the following is a UNIT RATE?

• 10 miles / 2 hours
• $6 for each hour
• 1 box / $3
• 15 pounds every 5 servings

Multiple Choice

A unit rate is a ratio in fraction form that has a _____________________________ of 1.

• numerator

• bottom number

• fraction

• denominator

Multiple Choice

What is the rate of change for the following graph?

• 80

• 20

• 40

• 160

Multiple Choice

• Taylor can write 6 words per minute

• Taylor can write 25 words per minute

• Taylor can write 50 words per minute

• Taylor can write 150 words per minute

Multiple Choice

Which rate of change represents the following the graph shown?

• $ 5 per movie
• $10 per movie
• $1 per movie
• $0.20 per movie

Multiple Choice

At what rate did the rain fall?

• 2 cm per hour

• ¹/₄ cm per hour

• ¹/₂ cm per hour

• 4 cm per hour

Representing Proportional Relationships

Multiple Choice

What is the formula for a proportional relationship?

• y=kx

• y=k/x

• k=kx

• y=ky

Multiple Choice

How do you find k? 

• x/y
• y/x
• y=kx
• x ⋅ y

Multiple Choice

Which graph is non-proportional?

• A
• B
• C
• D

Multiple Choice

Write an equation for this relationship.

• y = 18x

• y = 18.50x

• y = 22.50x

• y = 22x

Multiple Choice

What does the point (2, 94) represent in this situation?

• Every week, they earn $94.

• After 94 weeks, they save $2.

• After 1 week, they save $47.

• After 2 weeks, they save $94.

Multiple Choice

The constant of proportionality can be found by finding the __________ _____________.

• unit rate

• ratio rate

• proportion answer

• rational number

Multiple Choice

The graph above shows the price of games in dollars.  Is the graph proportional and how do you know?

• The graph is proportional  because it is linear.
• The graph is proportional because it is linear and passes through the origin.
• The graph is not proportional because it does not pass through the origin.
• The graph is not proportional because it is not linear and it does not pass through the origin.

Multiple Choice

Does this graph represent a proportional relationship?

• Yes

• No

Multiple Choice

Does the table represent a proportional relationship?

• Yes.

• No.

Multiple Choice

Using the graph above, determine the constant of proportionality.

• k = 0
• k = 1
• k = 3
• k = 6

Multiple Choice

The number of trees and the number of apples are given in the table above.  Determine which statement below is correct.

• The table is not proportional because the unit rate is not constant.
• The table is proportional and the unit rate is 1/13
• The table is proportional and the unit rate is 13.
• The table is not proportional because it doesn't pass through the origin.

Multiple Choice

Does this graph represent a proportional relationship?

• Yes
• No

Multiple Choice

Does the table represent a proportional relationship?

• Yes.

• No.

Direct Variation

Multiple Choice

Is this a direct variation? y =2x + 1

• Yes

• No

Multiple Choice

Is this proportional?
y=2x

• yes
• no

Multiple Choice

What is another name for k?

• y- intercept
• x 
• slope
• x- intercept

Multiple Choice

Which of the given graphs is a direct variation?

• A
• B
• C
• D

Multiple Choice

Libby's two hamsters eat 1 cup of food per week. Assuming the amount of food eaten varies directly with the number of hamsters, how much food would 7 hamsters eat?

• 3.5 cups

• 3 cups

• 7 cups

• 1 cup

Multiple Choice

The number of kilograms of water in a person’s body varies directly as the person’s mass.  A person with a mass of 90 kg contains 60 kg of water.  How many kilograms of water are in a person whose mass is 75 kg?

• 50 kg water
• 72 kg water
• 94 kg water
• 150 kg water

Multiple Choice

y varies directly with x. When y = 39, x = 3. Find the value of y when x = 2.

• 26

• 3

• 58.5

• 2

Multiple Choice

Is the given table a direct variation? If so, what is the constant?

• Yes; 1/4
• Yes; 4
• Yes; 2
• No

Multiple Choice

The amount of money earned on a job is directly proportional to the number of hours worked.  If $70.00 is earned in 5 hours, how much money is earned in 22 hours of work?

• $2
• $308
• $1.57
• $265

Poll

How do you feel about the unit 3 material we reviewed today?