You have the following function:

Derivate implictly the previous expression, as follow:

Where you have used that:

Then, the implicit derivative of the given expression is:

Next, solve for y' as follow:

It is a right Right Triangle because, they have two equal sides.
I think that the answer is 2, because if you multiply two by each factor in the original photograph then you get the size of the new photograph.
Answer:
2=4x+7
Step-by-step explanation: