A nutritionist collects data from 25 popular breakfast cereals. For each cereal, the number of calories per serving is plotted on the x-axis against the number of milligrams of sodium on the y-axis. The value of r for the resulting scatterplot is 0.83. Which of the following is a correct interpretation of this value? a. Each additional calorie is predicted to add approximately 0.83 mg of sodium.
b. There is a positive relationship between calories and sodium. The relationship is weak.
c. There is a positive relationship between calories and sodium. The relationship is strong.
d. As the number of calories increases, the amount of sodium decreases. The relationship is strong.