Proportional Relationships

In the equation y = 14x, what is the constant of proportionality?

• y
• x
• 14
• 14x

Write an equation for this relationship.

• y=18x
• y=18.50x
• y=22.50x
• y=22x

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

• 45
• 90
• 135
• 2

Is this table proportional?

• Yes
• No
• Yes, where x=1 & x=2
• Yes, where x=3 & x=4

Is this graph proportional?

• Yes
• No

What makes a graph proportional?

• Linear
• The line goes through the origin
• Curvy line
• Linear and the line goes through the origin

BeJohn walked 7 miles in 2 hours. What is his unit rate of miles per hour?

• 3.5 miles per hour
• 7/2 miles per hour
• 7.2 miles per hour
• 3 miles per hour

8.  Find the unit rate of $97.50 for 15 pizzas.

• $6 per pizza
• $82.50 per pizza
• $5.50 per pizza
• $6.50 per pizza

Cassiana and her family are driving to Colorado. They have been traveling for 4 hours, and have driven 260 miles. Find the speed they are traveling in miles per hour.

• 85
• 65
• 60
• 70

What is a unit rate?

• A comparison of two quantities where the denominator is always 1 unit
• A rate that compares 2 different quantities
• a rate with units 
• a comparison of two quantities where the first quantity is always 1