Question

A plant grows at a constant rate of __ cm per day.

A. write a direct variation equation for the height Y a plant will grow in X days. ___

B. What will be the height of a plant in 9 days? __

C. if the height of the plant is 21 cm, how many days has the plant been growing?

Answer 1

Plant grows at 3CM per day

equation: y= 3x

21 is y so 21= 3x. divide by 3 so it's been 7 days