The true statement that explains the correlation coefficient is: C. As the baby gains weight, the prices of smartphone tend to increase.
The value of the correlation coefficient shows a relationship between two variables. A positive value suggests a positive relationship, meaning as one variable increases, the other also increases.
A correlation coefficient of 0.87 suggests a positive relationship between baby's weight and the price of smartphone, therefore, the true statement is:
C. As the baby gains weight, the prices of smartphone tend to increase.
Learn more about correlation coefficient on:
https://brainly.com/question/4219149
#SPJ1