Linear Relationships

Which of the following represents the constant of proportionality in the table below?

• k = 85

• k = 95

• k = 190

• k = 125

The total number of eggs, y, contained in x cartons can be represented by the equation y = 12x. Which of the following graphs best represents this situation?

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Which of the following equations best represents the relationship between x and y?

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Marcy has earned 18 rewards points at the movie theater and will earn 3 points for each additional movie. Which equation represents the relationship between y, the total points, and x the number of movies?

• y = 18 + 3x

• y = 3x – 18

• y = 18 – 3x

• y = 18x + 3

Which graph best represents the equation y = 1.5x - 2?

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What is the constant of proportionality for this table?

• 1/9

• 9

• 8

What is the constant of proportionality for the table above?

• 2

• 1/2

• 3

• None of the above

In the equation y = 14x, what is the constant of proportionality?

• y

• x

• 14

Which of the following is the correct formula for finding the constant of proportionality?

• k = x/y

• k = y/x

• y = k/x

• x = k/y

What is the missing number in the ratio table?

• 72

• 85

• 76

• 90