Proportional Relationships

Which could not be a proportional situtation?

• The number of gallons of water in x barrels with 42 gallons of water in each barrel

• The amount an employee who makes $8.50 per hou ears in h hours

• The weight in a x weeks of a puppy that gains 2 pounds oer week if its starting weight is 8 pounds

• The cost of purchasing p pounds of bananas for $0.55 per pound

Which situation represents a proportional situation?

• The cost of purchasing a basket of oranges for $1.30 per pound plus $5.00 for the basket

• The cost of purchasing peaches for $7.00 per box pf peaches with a delivery charge of $3.00

• The cost of purchasing grapefruit for $1.80 per pound with a coupon for $1.00 off the total cost

• The cost of purchasing apples for $1.75 per pound plus a shipping fee of $0.16 per pound

Which of the following is not a way to determine a proportional situation?

• 
• Goes through the origin. (0,0)

• Use STAT. b=0

• 

• A

• B

• C

• D

Proportional or Non-Proportional?

• Proportional

• Non-Proportional

Jimmy was going on vacation. His parents drove the first day and went 390 miles in 6 hours. The next day they drove for 8 hours and went 520 miles. What was their constant rate of speed? 

• 65 miles∕1hr
• 60miles∕1hr
• 40miles∕1hr
• 50miles∕1hr

You can buy 36 cookies for $4. What is the unit rate (in cookies per dollar)?

• 4 cookies per dollar
• 6 cookies per dollar
• 9 cookies per dollar
• 1/9 dollars per cookie

Write an equation for this situation.

• y=9.75x

• y=19x

• y=19.25x

• y=9.5x

If the constant of proportionality is 7, which of the following is the correct proportional equation?

• y=7k
• y=k7
• y=kx
• y=7x

Determine which equation does NOT represent a proportional relationship.

• y = -2x

• y = 3.4x

• y = 3x

• y = 5x - 7