Which best describes the strength of the model?
the table shows the number of calories in four meals and
the cost of each meal.
cost of meal and number of calories
number of calories cost of
in the meal the meal
550=$12

1,250=$11

780=$13
650=$10

a. a weak positive correlation
b. a strong positive correlation
c. a weak negative correlation
d. a strong negative correlation

Option C

Step-by-step explanation: A Positive correlation means that as one variable increases, also does the other variable.

In this case, if we put the data in order we have:

$10 650 calories

$11 1250 calores (here we have an increase)

$12 550 calories (here we have a decrease)

$13 780 calories (here we have an increase)

The correlation can be calculated with a calculator, and it yields to:

C = (∑(x-x')(y-y'))/√(∑(x-x')^2*∑(y-y')^2) = -0.12924

(where y' and x' are the means of the variables x and y)

So whe can see that the correltion is negative and close to zero, so this is a weak negative correlation.