Answer:
Greta is correct. The answer is y = 4x
Step-by-step explanation:
This is because one person is able to plant four trees and five people are able to plant 20 in the same amount of time which means 4 trees is to 1 person. In other words if you substitute the values into the equation you will see that x = 1 in the first scenario and x = 5 in second scenario.I will work out the second scenario below.
y = 4x (where y = 20)
20 = 4(x)
5 = x
OR
y = 4x (where x = 5)
y = 4 * 5
y = 20