Which two ratios form a proportion?
A)
3:4 and 6:12
B)
3:4 and 9:15
o
3:4 and 12:18
D)
3:4 and 15:20

D) 3:4 & 15:20

Explanation:

Ratios that form a proportion are ratios that, when divided or multiplied by the same number to both sides of the ratio, would equal the other.

A) is not a proportion, because the numerator was multiplied by 2, but the denominator was multiplied by 3.

B) is not a proportion, because the numerator was multiplied by 3, but the denominator was multiplied by 3.75.

C) is not a proportion, because the numerator was multiplied by 4, but the denominator was multiplied by 4.5

D) is a proportion, because both the numerator and denominator was multiplied by 5 to get the other ratio:

3 x 5 = 15

4 x 5 = 20

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a conclusion based on evidence is an example of a. inference