Ryan conducted a 6-day study observing the effects of an organic plant food on the growth of his sprouting bean plant. He tracked these two pieces of information:
The amount of plant food remaining in the container after each day’s feeding
the height of the plant over time.
Ryan also found that he could model the height of his plant with the
equation h = 0.5d + 4 . d - number of days , h - height in centimeters

Which statement is true about the relationship between the height of the plant and the number of days?

This relationship is a function because the plant can only be one height at a time.
This relationship is not a function because the plant can only be one height at a time.
This relationship is a function because the plant can be more than one height at a time.
This relationship is not a function because the plant can be more than one height at a time.