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)
To find the scale factor, we divide the corresponding sides of the enlarged artwork by the corresponding sides of the original artwork.
For the length, we divide 3.15 inches by 2.25 inches:
3.15 / 2.25 = 1.4
For the width, we divide 2.8 inches by 2 inches:
2.8 / 2 = 1.4
Therefore, the scale factor Bobby used to create the copy of the original artwork is 1.4 (or 1.4 : 1).