The correlation values which represents a perfect linear relationship between x and y are:
b. 1 and d. -1
A perfect linear relationship is indicated by a correlation with a magnitude of 1. The sign of the correlation coefficient is the sign of the slope of the line describing the relationship. It may be positive or negative.
The appropriate choices are :
b. -1
d. 1
A perfect linear relationship (r=-1 or r=1) states that a linear function of one variable can perfectly describe the other.
A statistical word used to express a straight-line relationship between two variables is a linear relationship (or linear association). Graphs and mathematical equations of the form y = mx + b can both be used to represent linear relationships.
Hence we get the required answer.
Learn more about Linear equations here:
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