Question

Keith applies a new brand of fertilizer to his grass.

He finds that the rate at which the grass grows can be modeled by a linear function.

He observes that the rate of growth is 1 centimeter every 3 days.

After 18 days, he measures the height of the grass to be 8 centimeters.

The initial height of the grass was
centimeters tall.

Answer 1

Answer:

2 cm

Step-by-step explanation:

Growth rate = 1 cm every 3 days (Given)

Find the growth in 18 days:

3 days = 1 cm

1 day = 1 ÷ 3 = 1/3 cm

18 days = 1/3 x 10 = 6 cm

Find the initial height:

Height at 18th day = 8 cm (Given)

Initial Height = 8 - 6 = 2 cm

Answer: The initial height was 2 cm