Exploring Proportional and Nonproportional Relationships

What defines a proportional relationship between two quantities?

• They have a constant difference.

• They have a variable difference.

• They have a variable ratio.

• They have a constant ratio or unit rate.

What is the unit rate for the cost of one pizza if 8 dollars is charged for one pizza?

• 8 dollars per pizza

• 32 dollars per pizza

• 16 dollars per pizza

• 24 dollars per pizza

Why is the cost of baseball game tickets considered a non-proportional relationship?

• The cost per ticket is always the same.

• The processing fee is constant.

• The ratio of cost to tickets is not constant.

• The number of tickets is always the same.

If Isabelle deposits $20 each week into her bank account starting with $120, what is her balance after the first week?

• $140

• $120

• $160

• $180

What is the balance in Isabelle's account after the second week?

• $140

• $160

• $200

• $180

Why is Isabelle's bank deposit relationship considered non-proportional?

• The balance increases by a constant amount.

• The initial deposit is $120.

• The ratios of balance to weeks are not equal.

• The weekly deposit is $20.

What is the unit rate of students per teacher if there are 48 students for every 2 teachers?

• 2 students per teacher

• 48 students per teacher

• 24 students per teacher

• 12 students per teacher

Why is the ratio of students to teachers at Lakeview Middle School considered proportional?

• The number of teachers is always the same.

• The ratio of students to teachers is variable.

• The number of students is always the same.

• The ratio of students to teachers is constant.

What is the simplified ratio of students to teachers at Lakeview Middle School?

• 2:1

• 12:1

• 48:2

• 24:1

What does it mean for a ratio to be constant?

• It is always one.

• It does not change.

• It is always zero.

• It changes frequently.