Ratios and Proportions

What is the speed, in meters per second, of a paper airplane that flies 180 meters in 6 seconds?

• 144 m/s
• 30 m/s
• 18 m/s
• 4 m/s

A 20-ounce bag of popcorn costs $2.40. If the unit price stays the same, how much does a 30-ounce bag of popcorn cost?

• $3.60
• $4.00
• $4.50
• $4.90

Casie and Josh want to compare the prices of their favorite cereals to determine which is less expensive. Casie's costs $3.12 for 24 oz., while Josh's costs $4.80 for 32 oz.

• Casie's cereal is the better deal.
• Josh's cereal is the better deal.

Scott drove 404.8 miles from his college to home and used 25.3 gallons of gasoline. His sister, Bonnie, drove 210 miles from her college to home and used 15 gallons of gasoline. Whose vehicle had better gas mileage?  

• Scott's vehicle because it used more gas.
• Bonnie's vehicle because it didn't go as far.
• Scott's vehicle because it had more miles per gallon.
• Bonnie's vehicle because it had more miles per gallon.

Shane typed a 1,300-word essay in 25 minutes. At this rate, determine how many words he can type in 35 minutes?

• 1,200 words
• 1,500 words
• 1,820 words
• 22,025 words

Sam typed 420 words in 10 minutes. If he continues to type at this rate, how many words will he have typed in 2 hours?

• 756 words
• 2,520 words
• 5,040 words
• 7,560 words

If x varies directly as y, and x = 8 when y = 24, what is the value of x when y = 9

• 1
• 2
• 3
• 4

Which statement about the relationships between distances and costs is true?

• Neither relationship is proportional
• Only the relationship for shipping company X is proportional.
• Only the relationship for shipping company Y is proportional.
• The relationships for both shipping company X and shipping company Y are proportional.

Which graph shows a proportional relationship with a unit rate of  2/3?

• A
• B
• C
• D

Write an equation for this situation in y = kx format.

• y=2x
• y=0.2x
• 2y=x
• 55=11x