Final answer:
Among the provided options, the value -0.83 has the highest absolute value, indicating that it represents the strongest correlation between two variables.
Step-by-step explanation:
The student asked which r-value represents the strongest correlation among the given options. The correlation coefficient (r-value) indicates the strength and direction of a linear relationship between two variables. It can range from -1 to 1, where 1 means a perfect positive correlation, -1 means a perfect negative correlation, and 0 means no correlation.
To determine the strongest correlation, we compare the absolute values of the correlation coefficients, disregarding the sign. The options provided were -0.83, -0.67, 0.48, and 0.79. Here, the absolute values are 0.83, 0.67, 0.48, and 0.79 respectively. The option with the highest absolute value indicates the strongest relationship, regardless of whether it is positive or negative. Therefore, the strongest correlation is represented by -0.83.