Which of the following is not a characteristic of both surveys and
observational studies?

There are actually two answers for this question.

The first one is "The study compares two or more treatments (possibly including "no treatment"). "

The other one is "The study involves one or more treatment groups and a control group."

Step-by-step explanation:

I remember taking this quiz and I got most of the answers (including this one) c o r r e c t.

answer: the price of one pound cabbage = $ 0.8

the point (10,8) represents that the cost of 10 pounds cabbage is $ 8

step-by-step explanation:

since, here is a proportional relation between the number of pounds of cabbage (x) and the price in dollars (y).

therefore, we can write,

⇒ y = k x

where k is the constant of proportionality.

now, point (5,4) is in the line.

thus, it will satisfies the above equation of line.

⇒ 4 = 5 k

⇒ k = 0.8

thus, the equation of the line is,

y = 0.8 x

a) for x = 1,

y = 0.8

therefore, the cost of one pound of cabbage is 0.8 dollars.

b) in the below graph (10,8) represents that the cost of 10 pounds of cabbage is 8 dollars.