Proportional Relationships 101

Look at the table.

What is k, the constant of proportionality?

• 5

• 10

• 1/5

• not here

Look at the table.

Which of the following is a true statement about the table?

• The table represents a non-proportional relationship because y/x is not the same value for every row.

• The constant of proportionality is -4.

• y/x > 0 for every row of the table.

• The k-value is -1/4.

Which of the following tables has a k-value of 2/5?

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Which of the following graphs shows a relationship that is not proportional?

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Which of the following graphs shows a proportional relationship with a k-value of 3/4?

(Hint: Make a table of values for each graph!)

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The table below shows the total number of books checked out, y, for x number of students at Cypress Middle School.

How many books were checked out by one student?

• 6

• 3

• 1

• 0

The table below shows the total number of books checked out, y, for x number of students at Cypress Middle School.

Which of the following statements about this situation is not true?

• The unit rate is 3 students for 1 book.

• This is a proportional relationship because y/x is 3 for every row of the table.

• The constant of proportionality for this relationship is 3.

• The graph of this situation is a straight line that passes through the origin.

The cost of 6 movie tickets is $43.50. What is the constant of proportionality that relates the cost in dollars, y, to the number of movie tickets, x?

• $43.50

• $6.00

• $7.25

• Not here

Mr. Parr can grade tests with partial credit at the rate of 15 tests in 1 hour. Which graph best represents y, the number of tests Mr. Parr can grade in x hours?

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Tags

CCSS.7.RP.A.2D