DCA Re-Test Review

Which statement is always true?

• a. A linear relationship is proportional.

• b. A linear relationship is non-proportional.

• c. A proportional relationship contains the point (0,0).

• d.A non-proportional relationship has a constant rate of change.

Which equation represents a proportional relationship?

Molly is filling bags of marbles. She makes each bag so that 3 out of every 8 marbles are blue. Which equation correctly compares the number of marbles she uses, x, to the number of blue marbles, y?

• The relationship is linear and proportional.

• The relationship is linear and non-proportional.

• The relationship is non-linear and proportional.

• The relationship is non-linear and non-proportional.

A mixture of pretzels and peanuts are placed in bags. Each bag contains 3 ounces of pretzels and 5 ounces of peanuts. Which graph has a slope that best represents the ratio of pretzels to peanuts in each bag?

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Which graph shows a linear non-proportional relationship between x and y?

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Which statement can you use to conclude that a relationship must be non-proportional?

• The graph of the relationship is linear

• The y-intercept of the graph of the relationship is ( 0, 1).

• The relationship has a constant rate of change.

• The equation of the relationship is in the form y = kx.