Which two ratios form a proportion?

A) 1 : 2 and 4 : 2
B) 1 : 2 and 6 : 3
C) 2 : 1 and 2 : 4
D) 2 : 1 and 6 : 3

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The answer is D did a USATestPrep on it 👌

To determine which two ratios form a proportion, we need to check if they are equivalent ratios.

To do this, we can cross multiply the terms of the ratios.

Let's go through each option:

A) 1 : 2 and 4 : 2

Cross multiplying gives us: 1 * 2 = 4 * 2
2 = 8

Since 2 does not equal 8, option A does not form a proportion.

B) 1 : 2 and 6 : 3

Cross multiplying gives us: 1 * 3 = 6 * 2
3 = 12

Since 3 does not equal 12, option B does not form a proportion.

C) 2 : 1 and 2 : 4

Cross multiplying gives us: 2 * 4 = 2 * 1
8 = 2

Since 8 does not equal 2, option C does not form a proportion.

D) 2 : 1 and 6 : 3

Cross multiplying gives us: 2 * 3 = 6 * 1
6 = 6

Since 6 equals 6, option D forms a proportion.

Therefore, the correct answer is option D) 2 : 1 and 6 : 3.

i think its a and b