Question

A line passing through which of the following pairs of coordinates represents a proportional relationship?

A.
(1.3, 3.3) and (2.3, 4.3)
B.
(2.5, 5) and (3, 5.5)
C.
(1.25, 2.25) and (2.5, 5)
D.
(1.25, 2.5) and (3.75, 7.5)

Answer 1

D

Explanation:

A proportional relationship is a relationship where the x and y values form equal ratios. The ratio is written as y/x.

A.

(1.3, 3.3) and (2.3, 4.3)

3.3/1.3 = 4.3/2.3 are not equal

B.

(2.5, 5) and (3, 5.5)

5/2.5 = 5.5/3 are not equal

C.

(1.25, 2.25) and (2.5, 5)

2.25/1.25 = 5/2.5 are not equal

D.

(1.25, 2.5) and (3.75, 7.5)

2.5/1.25 = 7.5/3.75 are equal.