Tina is growing sunflowers in her garden. the flowers are currently 6 inches tall each week x, they will double in size . which equation best represent how tall the sunflower will b in x weeks

For this case we have an equation of the form:
 y = A (b) ^ x
 Where,
 A: initial height
 b: growth rate
 x: time
 Substituting values we have:
 y = 6 (2) ^ x
 
 An equation that best represent how tall the sunflower will b in x weeks is:
 y = 6 (2) ^ x