Answer:
The cost of any number of 8*10 photos is twice the cost of the same number of 5*7 photos.
Step-by-step explanation:
Given that the cost of 5 inch by 7 inch photo is $1 and the cost of 8 inch by 10 inch photo is $2.
This means that the cost of each 8 inch by 10 inch photo is twice the cost of 5 inch by 7 inch photo.
According to the table, it follows the same trend for other corresponding numbers of photos.
Therefore;
The cost of any number of 8*10 photos is twice the cost of the same number of 5*7 photos.