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AssignmentMultiple Select

Graphing Proportional Relationships

Question 3 • AL-Mathematics 7 A

Use the interactive graph to plot each set of points. Which sets represent proportional relationships? Check all that apply.

Answer
A
(1, 4), (3, 8), (5, 9)
B
(3, 2), (6, 4), (9, 6)
C
(2, 2), (4, 4), (6, 6)
D
(1, 3), (2, 7), (3, 8)
E
(0, 0), (1, 2), (2, 4), (4, 8)

Explanation

A proportional relationship has the form y = kx, so each point must have the same y/x ratio, and the relationship must include (0, 0). In B, each ratio is 2/3; in C, each ratio is 1; and E includes (0, 0) with the other ratios all equal to 2. The ratios in A and D are not constant.

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