What is missing? 40,10,___,5/8,5/32

Answer this question! 30 points and brainliest! only if you know the answer.

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

What would be the reasons for lines 3 and 4? a. addition property; subtraction property b. addition property; solve c. substitution property; subtraction property d. substitution property; prove