Question

A plant measures 6cm two weeks into an experiment and then measures 12cm four weeks after that. Write the equation of the line describe this situation if x=weeks and y=centimeters

Answer 1

y = 3x

Explanation:

Use rise over run (y2 - y1) / (x2 - x1) to find the slope

(12 - 6) / (4 - 2)

6/2

= 3

The plant will be 0 cm at 0 weeks, since 3(0) = 0

So, the equation will be y = 3x