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 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.

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

The dimensions of the original artwork are 2.25 inches by 2 inches.

The dimensions of the enlarged artwork are 3.15 inches by 2.8 inches.

To find the scale factor, we can divide the corresponding dimensions:

Scale factor in width = 3.15 inches / 2.25 inches = 1.4

Scale factor in height = 2.8 inches / 2 inches = 1.4

Since the scale factor is the same for both the width and height, we can conclude that the scale factor used by Bobby to create the copy of the original artwork is 1.4 (as a decimal).

To find the scale factor, we need to compare the dimensions of the original artwork with the dimensions of the enlarged copy.

Original Artwork:
Length = 2.25 inches
Width = 2 inches

Enlarged Copy:
Length = 3.15 inches
Width = 2.8 inches

To find the scale factor for the length, we divide the length of the enlarged copy by the length of the original artwork:

Scale factor for length = 3.15 inches / 2.25 inches = 1.4

To find the scale factor for the width, we divide the width of the enlarged copy by the width of the original artwork:

Scale factor for width = 2.8 inches / 2 inches = 1.4

Since both the length and width have the same scale factor, the overall scale factor used by Bobby to create the copy is 1.4.