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.

Answer 1

To find the scale factor, we can divide the corresponding dimensions of the copy by the dimensions of the original artwork.

For the width, the ratio is 3.15 inches / 2.25 inches ≈ 1.4.
For the height, the ratio is 2.8 inches / 2 inches = 1.4.

Therefore, the scale factor used to create the copy of the original artwork is 1.4.