Kelly and Greta are asked to write an equation for the given scenario. “One person was able to plant 4 trees in the same amount of time that 5 people working together were able to plant 20 trees.” The girls agree that x represents the number of people working and y represents the number of trees planted. Kelly wrote the equation y is equal to 1 fourth x , and Greta wrote the equation y is equal to 4 x Which person is correct, and why?
Answer
A
Kelly is correct; 1 is equal to 1 fourth times 4 and 5 is equal to 1 fourth times 20 .
B
Greta is correct; each person plants 4 more trees than the person before them.
C
Greta is correct; 4 is equal to 4 times 1 and 20 is equal to 4 times 5 .
D
Kelly is correct; each person plants 1 fourth more trees than the person before them.