Unit 2 Quiz Prep

Unit 2 Quiz Prep

Today we will review the material you may see on tomorrow's quiz.

UNIT 2 VOCABULARY

11 VOCABULARY WORDS

Multiple Choice

Two ratios that name the same comparison (have the same value) are called

• equivalent ratios

• rate

• constant of proportionality

• complex fractions

Multiple Choice

A relationship between two quantities in which the ratio of one quantity to the other is constant is called

• rate

• constant

• proportion

• rate of change

Multiple Choice

A ratio that compares the amount of change in a dependent variable to the amount of change in an independent variable is called:

• rate

• ratio

• rate of change

• proportion

Multiple Choice

A constant ratio of two variables related proportionally; k = y/x

• constant of proportionality

• rate

• unit rate

• proportion

Ratios and Proportions Review

• Finding Unit Rates using fractions

• Determining if relationships are proportional in a graph, table, equation

• Calculating the constant of proportionality, and writing equations

Unit Rates

1. Set up the Rate (what units are you comparing?)
2. Divide the Numerator by Denominator
3. Simplify

Multiple Choice

Your favorite restaurant sells 15 wings for $17.99. What is the cost per wing?

• $1.1

• $1.20

• $1.75

• $1.19

Multiple Choice

Paige mows 1/6 of an acre in 1/4 hour. How many acres does Paige mow per hour?

• 6/4

• 2/3

• 2

• 3

Multiple Choice

After 15 minutes a train has moved  $\frac{9}{2}$   miles toward its destination. How many miles per minute is the train moving?

• 4.5 miles per hour

• 0.3 miles per hour

• 7.5 miles per hour

Multiple Choice

Your parents asked you to calculate miles per gallon for the family road trip. They drove 256 miles with 8 gallons of gas. How many miles per gallon?

• 16 miles per gallon

• 42 miles per gallon

• 24 miles per gallon

• 32 miles per gallon

Multiple Choice

Which is NOT equivalent to 3:5?

• 15:25
• 9:15
• 21:28
• 30:50

Multiple Choice

Find the unit rate.
Hannah reads  5/ 8 page in 2/3 minute

• 15/16 pages per minute
• 10/24 pages per minute
• 5/8 pages per minute
• 16/15 pages per minute

Proportional Relationships

1. Proportional Graphs will form a straight line AND pass through the origin.
2. Proportional Equations are written in the form y=kx
3. To find the constant of proporitonality, remember to divide the y value by the x value.

Multiple Choice

Write an equation for this relationship.

• y = 18x
• y = 18.50x
• y = 22.50x
• y = 22x

Multiple Choice

Write the equation for the table given

• y = 1/3x
• y = 3x
• y = 1/2x

Multiple Choice

Does this graph represent a proportional relationship?  

• No, because it doesn't pass through the origin.
• Yes, because it doesn't pass through the origin.
• Yes, because it intersects the y axis.
• No, because it intersects the x axis.

Multiple Choice

Does the graph show a proportional relationship?

• Yes
• No

Multiple Choice

What is the unit rate for the rain fall?

• 2 cm per hour
• 1 cm per hour
• ¹/₂ cm per hour
• 4 cm per hour

Multiple Choice

Write an equation for this relationship.

• y=4x
• y=1/8x
• y=1/4x
• y=8x

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

The equation for the table is y=9x.  Use the equation to find how much money they would make in 14 hours?

• $155
• $150
• $1.55
• $126

Multiple Choice

What is the constant of proportionality (in miles per hour) based on the table?

• 45
• 90
• 135
• 2

Percent Change

To find the percent change, divide the difference between both values by the starting amount! Convert your value to a percent.

Multiple Choice

In 1999, the price of unleaded fuel was $1.09.  In 2015, the price of unleaded fuel is $1.89. What is the percent change?

• 173% increase
• 73% increase
• 73% decrease
• 27% increase

Multiple Choice

Last week, the price of American cheese was $5 per pound. This week, it costs $6 per pound. What is the percent change? 

• Increase 20%
• Decrease 20%
• Increase $1
• Decrease $1

Multiple Choice

A school's population increased from 1250 to 2000 students. What was the percent of increase?

• .375%
• .6%
• 37.5%
• 60%

Multiple Choice

What is the equivalent percent to 0.05?

• 50%

• 500%

• 5%

• 0.05%

Multiple Choice

Sales of the Xbox One increased from 10,000 to 18,500 in November. What was the percent increase?

• 8.5%
• 45.9%
• 85%
• 85.8%

Multiple Choice

The number of people signed up for a bus trip increased from 32 to 45. What is the percent increase? Round to the nearest percent.

• 52%
• 41%
• 42%
• 45%

Multiple Choice

The regular price of a scooter is $65.50. It is on sale for $52.40. What is the percent decrease from the regular price to the sale price of the scooter? 

• 35%
• 25%
• 30%
• 20%