Abean plant grows at a constant rate for a month. after 10 days, the plant is 25 centimeters tall. after 20 days, the plant is 45 centimeters tall. which equation models the height of the plant, y, after x days?
a. y – 10 = (x – 25)
b. y – 25 = (x – 10)
c. y + 25 = 2(x + 10)
d. y – 25 = 2(x – 10)