Question

Hey guys, I need help with these Scale factor problems! problems are linked in a screenshot below:

Answer 1

1. A → B: 1/3
2. correct
3. A → B: 2/5

Explanation:

It is clear from your answer to the second part that you know the A→B scale factor is the reciprocal of the B→A scale factor. Use that fact for the other two parts of the question.

1. A → B = 1/3; B → A = 3
2. A → B = 2; B → A = 1/2
3. A → B = 2/5; B → A = 5/2

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It is convenient to find a unit length (or the smallest length) on the smaller figure, then see how much that is multiplied by to get the larger figure.

1. B : A = 1 : 3
2. A : B = 1 : 2
3. B : A = 2 : 5

Once you have these ratios, you need to determine what the notation A→B is supposed to mean. Here, we presume it means B/A.