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The function y varies directly as x for all real numbers in the (x, y) coordinate plane. Which of the following could be the graph of y?

(A)

(B)

(C)

(D)

(E)

The Correct Answer

In the standard (x,y) coordinate plane, which of the following is the equation of the line perpendicular to the line y = -2x + 2 and that passes through the point (0,-3)?

(A) y = -2x - 3 (B) y = -x + 2 (C) y = x -3 (D) y = x + 2 (E) y = 2x - 3

Correct Answer: C

The table below shows the percents of U.S. citizens who had ever consumed a certain brand-name soda, out of all soda consumers, for each year from 1986 through 2006.

The figure below shows a scatterplot of the data in the table and solid lines that are possible models for the data. Which of the 5 lines appears to be the best representation of the data?

(A) A (B) B (C) C (D) D (E) E

Correct Answer: D

Points (2, - 2) and (3,10) lie on the same line in the standard (x,y) coordinate plane. What is the slope of this line?

(A) 12 (B) 8 (C) (D) -8 (E) -12

Correct Answer: A

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