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At the beginning of spring, London planted a small sunflower in her backyard. The sunflower's height in inches,
h
h, after
w
w weeks, is given by the equation
h
=
4
w
+
15
h=4w+15. What could the number 4 represent in the equation?

The change in the sunflower's height for every one additional week.
The sunflower's height after one week.
The sunflower's final height
The sunflower's height after 0 weeks.