7th Grade Quiz 1

Do these ratios form a proportion?

2 questions every 16 seconds

1 question every 8 seconds

• yes

• no

Roxanne is measuring the diameter and the radius of different-sized circles. A circle with a 3-inch radius has a diameter of 6 inches. A circle with a 4-inch radius has a diameter of 8 inches. In this relationship, x represents the radius in inches, and y represents the diameter in inches. According to the graph, do x and y have a proportional relationship?

• yes

• no

Select the tables that show a proportional relationship between x and y.

• 
• 

Ava is starting a summer camp for children who are deaf or hard of hearing. She needs to hire enough counselors to chaperone the children. There is a proportional relationship between the number of counselors Ava hires, x, and the maximum number of children who can attend the camp, y. What is the constant of proportionality?

• 1 child per counselor

• 2 children per counselor

• 3 children per counselor

• 4 children per counselor

Keith's Diner offers its clients a choice of regular and diet soda. Last night, the diner served 80 sodas in all, 8 of which were regular. What percentage of the sodas were regular? Choose the correct answer.

• 0.1%

• 10%

• 8%

• 80%

Choose the missing number.

• 10

• 1

• 0.1

• 0.01

A 2-quart carton of orange juice costs $5.20. What is the price per cup?

• $2.65

• $1.65

• $0.65

• $6.50

Mitchell went on a shopping trip to Knesington. He purchased a pair of headphones originally priced at $50 but discounted 60%. If sales tax in Kensingtonis 15%, what was the total cost?

• $30

• $3.00

• $20

• $23

Josh has $200 in a savings account that earns 5% interest per year. The interest is not compounded. How much will he have in total in 1 year?

Use the formula i = prt, where i is the interest earned, p is the principal (starting amount), r is the interest rate expressed as a decimal, and t is the time in years.

• $20

• $210

• $110

• $10

In which story is the answer to the question 0?

• Story 1

• Sotry 2