Changing a Scale Answers
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1
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What error did Anya make?
A
She set up the proportion incorrectly; the second ratio should be .
B
She cross-multiplied incorrectly.C
She divided incorrectly.D
She used the wrong label; it should be inches.2
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Which ideas did you include in your response? Check all that apply.
A
Ivan wrote the ratio incorrectly.B
The ratio should be written as the old length to the new length, so it should be , which reduces to .
C
When going from larger to smaller dimensions the change in the scale factor is a ratio that looks like an improper fraction.D
The change in the scale factor should have a larger number in the numerator and a smaller number in the denominator.3
The change in the scale factor is . The change of scale means that 1 inch represented 4 feet, but now 1 inch represents feet.
Answers:
Selection 1:4/5
Selection 2:5
4
Explain how to find the original and the new dimensions of an object when the scale changes.
Answer:
PENDING
5
Which ideas did you include in your response? Check all that apply.
A
Write a proportion with the original scale as the first ratio and the scale dimension compared to the actual dimension as the second ratio.B
Write a proportion with the new scale as the first ratio and the scale dimension compared to the actual dimension as the second ratio.C
Use cross products to solve both ratios.
7
Explain how an enlargement or a reduction in the dimensions of a building would cause a change in the scale factor.
Answer:
PENDING
8
Which ideas did you include in your response? Check all that apply.
A
The scale factor is a proportional relationship.B
Enlargements have a scale factor greater than 1.C
Reductions have a scale factor between 0 and 1.D
The proportion should be preserved.Did you find these answers helpful?
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