Answer:
D
Step-by-step explanation:
As you can see, the range of the graph is all real numbers greater than -4. Therefore you can tell that -4 will have to be in the equation leaving only options B and D. When graphing B and D, D fits the image.
Do you mean irrational?
y / x
That would produce how many feet are covered in each hour. You'd just need to plug in the numbers so to speak.