<u>Answer:</u> Greta is correct.
<u>Explanation:</u>
Greta is correct sine you can substitute different number of people for each of the values of and y and check that each person will still plant 4 trees.
For example:
4x = 4(1) = 4 trees; and
4 x 5 = 20
but you should follow a certain pattern to increase the value of x, such that every foe every value of x, one person is able to plant 4 trees.
Answer:
The confidence interval is (0.81, 0.87).
Step-by-step explanation:
There's 90% confidence that population proportion is within the interval obtained from the following formula:

Knowing that the sample size,
we obtain the proportion of people from the sample who leave one space after a period as
.
We then look for the critical value:

Now we can replace in the formula to obtain the confidence interval:

Therefore we can say that there's 90% probability that the population proportion of people who leave one space after a period lies between the values (0.8137; 0.8663).