4/5 + 1/15= least multiple that is the same

15

Step-by-step explanation:

The smallest number five and 15 can be divided into is 15 Th

for ex: the reciprocal of 3/4 is 4/3. it is the opposite.

reciprocal definition:

a mathematical expression or function so related to another that their product is one; the quantity obtained by dividing the number one by a given quantity.

i believe that the answer is

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

hope this !