One number exceeds another number by 18. find the numbers if the result of adding their sum and their product is a minimum.

If one number exceeds another by 18, the relation between the two numbers is

So, their product is

This parabola is concave up, so its vertex is its minimum. The vertex lies in .

So, the two numbers are 0 and 18.

i believe that the answer is

b. y-1=-2(x-4)

hope this !