Question

part i – selected response

1. how would you describe the association in

the following scatter plot?
a. no association
b. positive association
c. negative association
d. normal association
scatter plot image
for numbers 2a – 2d, circle the type of
association you would expect the following
data sets to have.
2a. the amount of sunlight a plant receives
and the amount of growth
positive negative no association
2b. a person’s height and their test scores
positive negative no association
2c. the weight of a car and the number of
miles per gallon it gets
positive negative no association
2d. the number of volunteers helping to paint
a house and the time it takes to paint
positive negative no association

Explanation:

Question 1

Step1: Analyze scatter plot trend

In the scatter plot, as the x - value (horizontal axis) increases, the y - value (vertical axis) decreases. A negative association is when one variable increases as the other decreases.

Step2: Evaluate options

• Option A: No association means points are randomly scattered, not the case here.
• Option B: Positive association is when both variables increase together, opposite of the trend.
• Option C: Matches the trend of decreasing y with increasing x.
• Option D: "Normal association" is not a standard term for scatter plot associations.

More sunlight generally leads to more plant growth, so as one variable (sunlight) increases, the other (growth) increases, indicating a positive association.

A person's height has no direct relationship with their test scores; one does not increase or decrease with the other, so there is no association.

Answer:

C. Negative association

Question 2a