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.
To find the scale factor, we can divide the dimensions of the enlarged artwork by the dimensions of the original artwork.
The scale factor for the length is 3.15 inches / 2.25 inches = 1.4.
The scale factor for the width is 2.8 inches / 2 inches = 1.4.
Therefore, the scale factor Bobby used to create the copy of the original artwork is 1.4.