Ratios & Rates
There are 8 red marbles and 12 blue marbles. What is the ratio of red marbles to blue marbles in simplest form.
What is 2:3?
Are these ratios equivalent? 3/4 = 9/12
What is yes?
Complete the table: x = 1, 2, 3 and y = 4, __, 12.
What is 8?
What is the name of the distance from the center of a circle to a point on the circle?
What is Radius?
A class has 12 boys and 18 girls. What is the ratio of boys to girls in simplest form?
What is 2:3?
A car travels 180 miles in 3 hours. What is the unit rate?
What is 60 miles per hour?
If 4 pencils cost $2, how much would 10 pencils cost?
What is $5?
Which equation represents a proportional relationship with a constant of proportionality of 7?
A) y=x+7
B) y=7x
C) y=7-x
D) y=x-7
What is B) y=7x?
A circle has a radius of 6 inches. What is its diameter?
What is 12 inches?
A recipe requires 4 eggs for every 12 cupcakes. How many eggs are needed for 36 cupcakes?
What is 12 eggs?
A recipe uses 3 cups of flour for every 2 cups of sugar. What is the ratio of flour to sugar?
What is 3:2?
A proportional relationship has a constant of proportionality of 6. Write an equation.
What is y = 6x?
A proportional relationship has x: 2, 5, 8 and y: 10, 25, 40. What is the constant of proportionality?
What is 5?
A circle has a diameter of 10 cm. Using π ≈ 3.14, find its circumference.
What is 31.4 cm?
A car uses 3 gallons of gas to travel 90 miles. At this rate, how far can it travel using 7 gallons?
What is 210 miles?
A runner travels 2.5 miles in 20 minutes. What is the runner's unit rate in miles per minute?
What is 0.125 miles per minute?
The table has x: 1, 2, 3, 4 and y: 5, 10, 15, 20. What is the constant of proportionality?
What is 5?
A movie theater charges $12 for each ticket. Write an equation for total cost y of x tickets.
What is y = 12x?
A circle has a radius of 5 m. Using π ≈ 3.14, find its circumference.
What is 31.4 m?
A circular track has a diameter of 50 m. Approximately how far is one complete lap? Use π ≈ 3.14.
What is 157 meters?
A store sells 6 notebooks for $9. What is the cost of 1 notebook?
What is $1.50 per notebook?
A proportional relationship is represented by y = 2.5x. What is y when x = 8?
The equation y = 4x represents the cost of apples. If x is pounds, how much would 7 pounds cost?
What is $28?
A circular garden has a diameter of 20 ft. What is its circumference using π ≈ 3.14?
What is 62.8 ft?
A student says y = 3x + 2 represents a proportional relationship. Is the student correct? Explain.
What is no?
A proportional relationship has the form y = kx and passes through the origin.