A biologist is studying the effect of pollution on the reproduction of a specific plant. She uses the functinio n (p) to represent these effect, where p is the number of seeds germinated by the test group of the plant over a given period of time. Which of the following lists could represent a portion of the domain for the biologist's function ?

Options

A. `{…-150, -100, -50,0,50,100,150…}`
B. `{-150,-100,-50,0,50,100,150}`
C. `{0,0.25,0.5,0.75,1,1.25,1.5…}`
D. `{0,20,40,60,80…}`

Answer

D

Explanation

The domain of a function includes every possible input value, which is usually represented by x. In this functin, instead of x, the input is represented by p, which is the number of seeds germinated by the plants over a given period of time. Because there cannot be a negative number of seeds germinated or a fraction of a seed germinated, the list in (D) is the only one that could represent of protion of the function's domain.