Proportions & Scale Factors Practice
Complete this assessment to review what you’ve learned. It will not count toward your grade.
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Question
Bobby draws an artwork measuring 2.25 inches by 2 inches. He makes a copy of the artwork, enlarging it so that its dimensions are now 3.15 inches by 2.8 inches. What scale factor did he use to create the copy of the original artwork? Write your answer as a decimal.(1 point)
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To find the scale factor, we can divide the corresponding dimensions of the copy by the original dimensions.
For the width, the copy is 3.15 inches and the original is 2.25 inches, so the scale factor for the width is:
3.15 / 2.25 = 1.4
For the height, the copy is 2.8 inches and the original is 2 inches, so the scale factor for the height is:
2.8 / 2 = 1.4
Since the scale factor is the same for both dimensions, the overall scale factor is 1.4.
Answer: 1.4