Ratio Rumble
Write the ratio of 8 red markers to 12 blue markers.
8:12 = 8/12 = 2/3
Use 12 inches = 1 foot. Convert 7 feet to inches.
84 inches.
Is this proportional? x: 1,2,3,4 and y: 4,8,12,16. Explain.
Yes. y/x = 4 for every pair.
A map scale is 1 inch : 20 miles. Two cities are 4 inches apart. What is the actual distance?
80 miles
A class has 15 girls and 10 boys. What is the ratio of girls to total students?
15:25 = 3:5 = 15/25 = 3/5
Use 3 feet = 1 yard. Convert 15 yards to feet.
45 feet
Is this proportional? x: 2,4,6 and y: 5,10,16.
No. The ratios y/x are not constant.
A recipe uses 2 cups of rice for 5 people. How many cups are needed for 15 people?
6 cups
A recipe uses 3 cups of flour for 2 batches. Using the same proportion, how many cups of flour it uses for 6 batches?
9 cups of flour for 6 batches
Use 1 mile ≈ 1.6 kilometers. Convert 5 miles to kilometers.
8 kilometers.
Tell whether the proportional relationship is equivalent. Explain your reasoning.
A conveyor belt moves at a constant rate of 12 feet in 3 seconds. A second conveyor belt moves 16 feet in 4 seconds.
Yes; both have a ratio.
A store sells 4 pens for $6. At the same rate, how much do 10 pens cost?
$15
A car travels 180 miles in 3 hours. What distance it will travel at the same pace after 8.5 hours? Round your answer to the nearest mile.
509 miles
A bottle holds 2 liters. How many gallons is that if 1 gallon = 3.79 liters?
Round to the nearest tenth.
0.5 gal
Tell whether the proportional relationship is equivalent. Explain your reasoning.
A salad dressing calls for 3 parts oil and 1 part vinegar. Manuela uses 2 tablespoons of vinegar and 6 tablespoons of oil to maker salad dressing.
Yes. Both have a ratio of 3:1 = 3/1
A runner goes 6 miles in 48 minutes at a constant rate. How many minutes per mile?
8 minutes per mile