Question

7. The graph shows the height, h, in feet, of water

sprayed from a fountain as a function of the
horizontal distance, d, in feet, the water has
traveled.
Water Fountain
h
3
69 12 15
Horizontal Distance (ft)
What is the domain of the function described in the
graph?
OA. All whole numbers less than or equal to 16
OB. All non-negative real numbers less than or
equal to 18
OC. All non-negative real numbers less than or
equal to 16
OD. All whole numbers less than or equal to 18
Height (ft)
20
16
12
18

Answer 1

The domain is talking about the "range" of the horizontal axis therefore you will be focusing on the x-intercepts.

The answer will be All non-negative real numbers less than or equal to 18

because the x-intercepts lies at 0 and 18. The answer makes sense because the furthest you can go is 18 ft and the closest you could go is 0 ft. The "all non-negative real numbers" puts a restriction on the least distance it could travel so that means that it stops at 0 ft because if you go any further, you will end up in the negatives and it clearly states "non-negative".